Question

(4a-7x)^2-(2a-x)(2a+x) упростить номер 9

Answer 1

(4a-7x)^2-(2a-x)(2a+x)=16a²-56ax+49x²-4a²+x²=12a²-56ax+50x²

(9b+5y)²-(5y-b)(5y+b)=81b²+90by+25y²-25y²+b²=82b²+90by