Упростите (4x-1)×(4x+1) =(3x-2)²=4a²+12ab +9b²=

(4х-1)(4х+1)=(4х)²-1²=16х²-1

(3х-2)²=(3х)²-2•3х•2+2²=9х²-12х+4

4а²+12аb+9b²=(2a)²+2•2a•3b+(3b)²=(2a+3b)²