In the equation 6x^2+7x-49 how does 7x become -14x and 21x?

See the explanation.

Step-by-step explanation:

Given function is

We will find its root by factoring.

In any quadratic function of the form

We will two numbers that when multiplied gives . And when that two numbers are added it turns to .

So, in .

And

So, we need to find two numbers that when multiplied give ,and when added give .

Now, we can see

In this manner, we can rewrite as .

this is a very good question

step-by-step explanation:

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