Question

(2х-3)^2+(3-4х)(х+5)менше или равно 82​

Answer 1

$(2x-3)^2+(3-4x)(x+5)leq 82\\4x^2-12x+9+3x+15-4x^2-20xleq 82\\4x^2-12x+3x-4x^2-20xleq 82-9-15\\-29xleq 58 /:(-29)\\xgeq -2\\xin[-2;+infty)$