Toán Lớp 8: tìm x biết:
a)2x(3-x)+5(x-3)=0
b) 4x^2(x-7)-9x+63=0
c) 5(x+2)^2 =3x(x+2)
d)4x^2(x-2021)-x2021-x=0
e)x^2-6x +9 =4 (x+2)^2
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Toán Lớp 8: tìm x biết:
a)2x(3-x)+5(x-3)=0
b) 4x^2(x-7)-9x+63=0
c) 5(x+2)^2 =3x(x+2)
d)4x^2(x-2021)-x2021-x=0
e)x^2-6x +9 =4 (x+2)^2
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