a^2+(3a-b)^2= (a-4)^2+a(a+8)= (a-c)*(a+c)-(a-2c)^2=...

сашаcij @сашаcij

July 2022 1 7 Report

a^2+(3a-b)^2=
(a-4)^2+a(a+8)=
(a-c)*(a+c)-(a-2c)^2=

Answers & Comments

hraky

Verified answer

1) a²+(3a-b)²=a²+9a²-6ab+b²=10a²-6ab+b²
2) (a-4)²+a(a+8)=a²-8a+16+a²+8a=2a²+16
3) (a-c)*(a+c)-(a-2c)²=a²-c²-a²+4ac-4c²=-5c²+4ac

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