Question

Упрастите выражение (5х-4)2+(3х-4)(3х+4)+90х срочно 55 балов​

Answer 1

$(5x - 4) {}^{2} + (3x - 4)(3x + 4) + 90x = \ 25x {}^{2} - 40x + 16 + 9x {}^{2} - 16 + 90x = \ 34x {}^{2} + 50x = \ 2x(17x + 25)$

Answer 2

(5х-4)² + (3х-4)(3х+4) + 90х =

= 25х² - 40х + 16 + 9х² - 16 + 90х =

= 34х² + 50х