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x la a doua -10x+16=0

Răspuns :

x²-2x-8x+16=0
x(x-2)+8(x-2)=0
(x-2)(x+8)=0

x-2 =0     x+8=0
x=2        x=-8


x²-10x+16=0

x²-2x-8x+16=0

x(x-2)+8(x-2)=0

(x-2)(x+8)=0

x-2=0

x=2

x+8=0

x=-8