Find the value of the expression below for x=6. x^2-2(x+5)

14

Step-by-step explanation:

If x = 6, then the equation can be simplified to 6^2 - 2 (x+5).

If you continue simplifying, you'd get 36 - 2 (6 + 5), then 36 - 22, which equals 14.

14

Step-by-step explanation:

x^2-2(x+5)

Let x=6

6^2 -2(6+5)

We follow PEMDAS, parenthesis first

6^2 -2(11)

Then exponents

36 -2(11)

Then multiply and divide

36 -22

Then add and subtract

14

10

Step-by-step explanation: Because 10times X when X=6 is 60 then 5 times Y when Y=10 makes it 50 then subtract the two numbers

60-50=10

16

Step-by-step explanation:

(6+1/3×6)^2

(6+6/3)^2

(12/3)^2

(4)^2

16

2x^3 +9x^2 y+9xy^2 +3y^3

Step-by-step explanation:

STEP

1

Equation at the end of step 1

3 • (x - y)3 - x3

STEP

2

2.1 Evaluate : (x-y)3 = x3-3x2y+3xy2-y3

Checking for a perfect cube :

2.2 2x3-9x2y+9xy2-3y3 is not a perfect cube

Final result :

2x^3 + 9x^2 y+ 9xy^2 + 3y^3

(I hope this helps you)

Option A)

Step-by-step explanation:

Given is an expression in x as

This will be real only for x>=6

(That is given already)

Now to find conjugate

Since x-6 is inside root sign, we can take this as one term.

Next term is -3.  To find conjugate we write the root sign term as it is and change the sign of next term from negative to positive

i.e. -3 becomes +3

Hence conjugate would be

Hence option A is right

The fourth answer choice is the correct one:  2(x - 3)

Step-by-step explanation:

2x²-18x+36/x-6 should be factored, as follows:

2(x²-9x+18) / (x-6) = 2(x - 3) (x - 6) / (x - 6)

Substituting x = 6 would result in division by zero and is thus not allowed.

Remembering this, we can reduce 2(x - 3) (x - 6) / (x - 6) to 2(x - 3) for x≠6.