Question

помогите пожалуйста решить ​

Answer 1

(5 + d)^2 = 25 + 2*5*d +d^2= 25 +10d +d^2

(4t-3y)(4t+3y) = (4t)^2 - (3y)^2 = 16t^2 - 9y^2

3c^3*b^2 - 12c^4*b = 3c^3*b(b - 4c)

1/9*a^2 - 25c^2 = (1/3*a - 5c)(1/3*a + 5c)

m + n - 6m^3 - 6m^2*n = -6m^2( m +n ) + (m+n) = (m+n)(-6m^2 + 1)

(6 - 10х)(х+2) - (5х + 2)(4 - 2х) = -11

6х + 12 -10х^2 -20х - 20х - 10х^2 + 8 -4х = -11

2х + 10 = -11

2х = -21

х= - 10.5