Question

Разложите на множители

d²-7d-8

y²+2y-8²

Answer 1

d²-7d-8=d²+d-8d-8=d(d+1)-8(d+1)=(d+1)(d-8)

y²+2y-8²=y²+2y-64=y²+2y+1-65=(y+1)²-65=(y+1)²-(√65)²=(y+1+√65)(y+1-√65)