Question

c,d,e,f va rog multt

Answer 1

Răspuns:

c) (3-x²)×2=1×16=> 6-x²=16=> x²=6-16=> x²=10=> x1=rad10;x2=-rad10

d)3x×3x=2×2=> 9x²=4=> x²=4/9=> x1=2/3;x2=-2/3

e)(x+1)×(x+1)=2×9=> x²+2x+1=18=>x²+2x-17=0

delta= 2²+4×1×17= 4+68= 72

x1=(-2+rad72)/-(4×1×17)

x2=(-2-rad72)/-(4×1×17)