O resultado x² – 4a² é obtido por meio de qual dos produtos notáveis abaixo? (yx - 2a)²
(yx + 2a)(yx + 2a)
(x + 2a)(x – 2a)
(x + a)(x + 2)
(yx + 2a)²

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4