Question

Упростите выражение:
А)3а^2b^2*(-5a^2b)
Б) (2х^5у)^3
В)15х+8у-х-7у
Г) (а+6)^2-(2а+3)(3-2а)

Answer 1

а)

$3 {a}^{2} {b}^{2} \times ( - 5 {a}^{2} b) = - 15 {a}^{4} {b}^{3}$

б)

${(2 {x}^{5}y) }^{3} = 8 {x}^{15} {y}^{3}$

в)

$15x + 8y - x - 7y = 14x + y$

г)

${(a + 6)}^{2} - (2a + 3)(3 - 2a) = {a}^{2} + 12a + 36 - (9 - 4 {a}^{2} ) = \\ \\ = {a}^{2} + 12a + 36 - 9 + 4 {a}^{2} = 5 {a}^{2} + 12a + 27$