Brennan was asked to simplify and solve equation, also what mistakes did Brennan make?

Can you please add a photo becauseI'm not sure how to help you out with this problem without context:)

Brennan was paid handsomely. He has a very good memory. He knows the whole of the Tulsi Ramayana by heart. When he sings, the words seem to flow from his heart. All present listen to him spell­bound. Singing has become his hobby. It is the only redeeming feature of his life.

But nowadays, there are schools. They can be educated. They can be trained in various handicrafts and thus made useful member of society. So the lot of a blindman is not as hard and miserable as it used to be.

He can become capable of earning his livelihood. If he so chooses. He can get higher education and thus secure a Government job. He need not feel helpless and miserable. Several avenues are open to him. There are chances for him to make his career.  

Learning how to simplify an expression is the most important step in understanding and mastering algebra. Simplification of expressions is a handy mathematics skill because it allows us to change complex or awkward expressions into simpler and compact forms. But before that, we must know what an algebraic expression is.

An algebraic expression is a mathematical phrase where variables and constants are combined using the operational (+, -, × & ÷) symbols. For example, 10x + 63 and 5x – 3 are examples of algebraic expressions.

In this article, we shall learn a few tricks on how to simplify any algebraic expression.

How to Simplify Expressions?

Simplification of an algebraic expression can be defined as the process of writing an expression in the most efficient and compact form without affecting the value of the original expression.

The process entails collecting like terms, which implies adding or subtracting terms in an expression.

Let’s remind ourselves of some of the important terms used when simplifying an expression:

A variable is a letter whose value is unknown in an algebraic expression.

The coefficient is a numerical value used together with a variable.

A constant is a term that has a definite value.

Like terms are variables with the same letter and power. Like terms can sometimes contain different coefficients. For example, 6x2and 5x2 are like terms because they have a variable with a similar exponent. Similarly, 7yx and 5xz are unlike terms because each term has different variables.

To simplify any algebraic expression, the following are the basic rules and steps:

Remove any grouping symbol such as brackets and parentheses by multiplying factors.

Use the exponent rule to remove grouping if the terms are containing exponents.

Combine the like terms by addition or subtraction

Combine the constants

:)

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

it is b)

hope this : )

step-by-step explanation: