Question

We(know) each other for ten years

Answer 1

Answer:

I hope it will help you

Explanation:

STEP

1

:

Equation at the end of step 1

(((9•(a2))-6a)+5)-(((2•5a2)+3a)+25)

STEP

2

:

Equation at the end of step

2

:

((32a2 - 6a) + 5) - (10a2 + 3a + 25)

STEP

3

:

STEP

4

:

Pulling out like terms

4.1 Pull out like factors :

-a2 - 9a - 20 = -1 • (a2 + 9a + 20)

Trying to factor by splitting the middle term

4.2 Factoring a2 + 9a + 20

The first term is, a2 its coefficient is 1 .

The middle term is, +9a its coefficient is 9 .

The last term, "the constant", is +20

Step-1 : Multiply the coefficient of the first term by the constant 1 • 20 = 20

Step-2 : Find two factors of 20 whose sum equals the coefficient of the middle term, which is 9 .

-20 + -1 = -21

-10 + -2 = -12

-5 + -4 = -9

-4 + -5 = -9

-2 + -10 = -12

-1 + -20 = -21

1 + 20 = 21

2 + 10 = 12

4 + 5 = 9 That's it