Help me vs toán 7, 5* ạ !!! :D?

F(x)=G(x) <=> -5x^2 + x + 22 = x^3 - x^2 - x + 14

<=> -5x^2 + x + 22 - ( x^3 - x^2 - x +14 ) = 0

<=> -5x^2 + x + 22 - x^3 + x^2 + x -14 = 0

<=> -x^3 - 4x^2 + 2x + 8 = 0

<=> -x^2(x + 4) + 2(x + 4) = 0

<=> (x + 4) ( -x^2 + 2) = 0

+TH1: x + 4 = 0 <=> x = -4

+TH2: -x^2 + 2 = 0 <=> -x^2 = -2 <=> x^2 = 2

<=> x = ± √2

Vậy f(x) = g(x) <=> x = -4; x = ± √2

F(x)=G(x) <=> x=-5x^2+x+22

<=> 5x^2-22=0

<=> 5x^2=22

<=> x=....

chắc vậy á e ơi, k đúng thì thui nha chỉ mún giúp e thui