Question

Mai ajutati`ma si la exercitiul asta
(x-3)²-2(x-4)(x+4)=1-(x-5)(x+4)

Answer 1

x²-6x+9-2x²-32=1-(x²+4x-5x-20}
-x²-6x-32=1-x²+x+20
-7x=20-32
-7x=-12
x=12/7

nu cred că mi-a dat bine :/

Answer 2

$(x-3) ^{2} -2(x-4)(x+4)=1-(x-5)(x+4) \\ x^{2} -6x+9-2( x^{2} -16)=1-( x^{2} +4x-5x-20) \\ x^{2} -6x+9-2 x^{2} +32=1- x^{2} +x+20 \\ - x^{2} -6x+ x^{2} -x=21-41 \\ -7x=-20 \\ x= \frac{20}{7}$