Question

Решите!!!
(3х+1)²=
16-а²=
4с-3х²=
(5х-3)²=
(9+4х)²=

Answer 1

(3x+1)^2 = 9x^2+6x+1
16-a^2=(4-a)(4+a)
4x-3x^2= x(4-3x)
(5x-3)= 25x^2-30x+9
(9+4x)^2= 81+ 72x+16x^2
Формула
(a+b)^2 = a^2+2ab+b^2
(a-b)^2 = a^2-2ab+b^2