Question

This is for my friend so if you could solve this asap that would be great

Answer 1

Answer:

1. 5x^2 − 3x − 2

2. 4s^2 −28s + 49

3. 4y^2 + 9y + 8

Answer 2

Answer:

[1] 5x² - 3x - 2

[2] 4s² - 28s + 49

[3] 4y² + 9y + 8

Explanation:

• (3x² + 4) - (-2x² + 3x + 6)

Remove Parenthesis: (a) = a

3x² + 4 - (-2x² + 3x + 6)

Simplify -(-2x² + 3x + 6): 2x² - 3x - 6

3x² + 4 + 2x² - 3x - 6

Simplify 3x² + 4 + 2x² - 3x - 6

5x² - 3x - 2

• (2s - 7)²

Apply Perfect Square Formula: (a - b)² = a² - 2ab + b²²: a = 2s, b = 7

(2s)² - 2 · 2s · 7 + 7²

Simplify (2s)² - 2 · 2s · 7 + 7²

4s² - 28s + 49

• (7y² + 9y - 2) + (-3y² + 10)

Remove Parenthesis: (a) = a

7y² + 9y - 2 - 3y² + 10

Group Like Terms

7y² - 3y² + 9y - 2 + 10

Add Similar Elements: 7y² - 3y² = 4y²

4y² + 9y - 2 + 10

Add: -2 + 10 = 8

4y² + 9y + 8