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(4x-3)^2-9(x+5)(x-2)=7(x+2)^2-8

Răspuns :

16x²-24x+9-9(x²+3x-10)=7(x²+4x+4)-8
16x²-24x+9-9x²-27x+90=7x²+28x+28-8
-51x+99=28x+20
-79x=-79
x=1