Question

PLEASE ANSWER + BRAINLIEST!!!

Answer 1

Answer:

The correct answer is option C.

Step-by-step explanation:

$(3x^2 + 3x + 5) + (7x^2 - 9x + 8) = 10x^2 - 12x + 13$

$3x^2 + 3x + 5 + 7x^2 - 9x + 8= 10x^2 - 12x + 13$

$x^2(3+7)+x(3-9)+5+8= 10x^2 - 12x + 13$

$10x^2-6x-13=10x^2 - 12x + 13$ (wrong)

$10x^2-6x-13\neq 10x^2 - 12x + 13$

Error made by Lucia was that she added coefficient of x. She must be subtracting those coefficients.

Hence,the correct answer is option C.

Answer 2

The answer is C. The middle term should be -6 and not -12.