(x+7)'2+(x-5)'2=2x'2

Question

(x+7)'2+(x-5)'2=2x'2

Comments

x^2+14x+49+x^2-10x+25=2x^2

Answer 1

Х^2+14х+49+х^2-10х+25=2х^2
4х=-74
х=74÷(-4)
х=18,5

Comments

А разве не -18.5?

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да