А)(5+x)²=? б)(1-3x)²=? в)(3a-10b)²=? г)(x²+4)²=?

Question

А)(5+x)²=?
б)(1-3x)²=?
в)(3a-10b)²=?
г)(x²+4)²=?

Answer 1

A)
(5 + x)^2 = (x + 5)^2 = x^2 + 10x + 25

b) 
(1 - 3x)^2 = (3x - 1)^2 = (3x)^2 - 2*3x + 1 = 9x^2 - 6x + 1

c)
(3a - 10b)^2 = (3a)^2 - 2*30ab + (10b)^2 = 9a^2 - 60ab + 100b^2

d)
(x^2 + 4)^2 = (x^2)^2 + 2*4x^2 + 4^2 = x^4 + 8x^2 + 16

Answer 2

Тебе нужно 1 и 2 формула