Question

a(a+1) - (a-3)^2 где a=-1​

Answer 1

а(а+1)-(а-3)^2=а^2+а-(а^2-6а+9)=-9+7а=-9-7=-16

Answer 2

Объяснение:

a(a+1) - (a-3)² = a² + a - (a² - 2*3*a + 3²) = a² + a - a² + 6a - 9 = 7a - 9

7a - 9 = 7*(-1) - 9 = -7 - 9 = -16