Объяснение:
(x+4)^2-2x(-5x+4)=(x^2+8x+16)+10x^2-8x=x^2+8x+16+10x^2-8x=11x^2+16
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Объяснение:
(x+4)^2-2x(-5x+4)=(x^2+8x+16)+10x^2-8x=x^2+8x+16+10x^2-8x=11x^2+16