Question

Упростите выражение (36b^2 - 25)(1/6b-5 - 1/6b +b) - b +7

Answer 1

$\bigg(36b^{2} - 25 \bigg) \bigg(\dfrac{1}{6}b - 5 - \dfrac{1}{6}b + b \bigg) - b + 7 = \\= (36b^{2} - 25)(b - 5) - b + 7 = 36b^{3} - 180b^{2} - 25b + 125 - b + 7 = \\= 36b^{3} - 180b^{2} - 26b + 132$