a)(5х-9)^2+(2х-9)(2х+9)+80х=25x^2-90x+81+4x^2-81+80x=29x^2-10x
б)29*(-1)^2-10*(-1)=29+10=39
Copyright © 2025 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Verified answer
a)(5х-9)^2+(2х-9)(2х+9)+80х=25x^2-90x+81+4x^2-81+80x=29x^2-10x
б)29*(-1)^2-10*(-1)=29+10=39