Question

Need help with homework please

Answer 1

4. (9x^2 + 13x) + (4x^2 - 8x)

(9x^2 + 13x)

9x^2 = 81 x + 13 x = 94x

(4x^2 - 8x)

4x^2 = 16x - 8x = 8x

94x + 8x = 102x

The answer is 102x

5. (x^2 + 4x + 6) + (x^2 + 8x + 3)

(x^2 + 4x + 6)

4x + 6 = 10x

10x + x^2 = 10x^2

(x^2 + 8x + 3)

8x + 3 = 11x

x^2 + 11x = 11x^2

The answer i 11x^2

6. (-3x^2 + 2x - 8) + (x^2 + 4x)

(-3^2 + 2x + 8)

-3^2 = 9

2x + 8 = 10x

10x + 9 = 19x

(x^2 + 4x)

x^2 + 4x = 4x^2

19x + 4x^2 = 23x^2

The answer is 23x^2.