Simplify

4 (5x^2-9x+7) + 2 (-10^2+18x-13)

The answer is 20x^2 - 198

4 (5x² - 9x + 7) + 2 (-10² + 18x - 13)

Distribute 4 inside the parentheses.

20x² - 36x + 28 + 2 (-10² + 18x - 13)

Find 10 to the power of two.

20x² - 3y6x + 28 + 2 (-100 + 18x - 13)

Combine like terms inside the parentheses (-100 - 13).

20x² - 36x + 28 + 2 (-113 + 18x)

Distribute 2 inside the parentheses.

20x² - 36x + 28 + (-226 + 36x)

Rewrite as - 226 and + 36x; remove the parentheses.

20x² - 36x + 28 - 226 + 36x

Combine like terms. The - 36x and 36x cancel each other out.

20x² - 198

is your answer.