(5х+4)(5х-4)-10(х-2) решение

Question

(5х+4)(5х-4)-10(х-2) решение

Answer 1

25х-20х+20х-16-10х+20 25х-10х=20-16 15х=4 Х=3.75

Answer 2

(5x+4)(5x-4)-10(x-2)=25x^2-20x+20x-16-10x+20=25x^2-10x+4