trankhanh261008 trankhanh261008

15-08-2021
Mathematics

contestada

tìm x a)
4x^2-12x=-9

Respuesta :

redbudtree84 redbudtree84

15-08-2021

Hi

Just told you : first know by heart remarkable identities !

Then apply :

4x²-12x = -9

4x²-12x +9 =0

(2x-3)² = 0

(2x-3) (2x-3) = 0

Now you have a double solution :

2x-3 = 0

and 2x -3 = 0

I let you try !

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