Question

выполнить умножение 1. (a-4)(a-2) 2.(3x+1)(5x-6) 3.(3y-2c)(y+6c) 4.(b+3)(b²+2b-2)

Answer 1

1))))а²-2а-4а+8=0
а²-6а+8=0
д=в²-4ас=36-36=0(0)
a=6/2=3
2))))15х-18х+5х-6=0
8х-6=0
8х=6
Х=6/8
х=3/4