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x²+9+6x-2x+10-4=
x²+4x+15
(a-5)²+4(a-7)+2a-10=
a²+25-10a+4a-28+2a-10=
a²-4a-13
(x+1)²-(x-2)²-4x-3=
x²+1+2x-(x²+4-4x)-4x-3=
x²+1+2x-x²-4+4x-4x-3=
2x-6
2(a-4)²-3(a+5)²-4(a-1)=
2(a²+16-8a)-3(a²+25+10a)-4a+4=
2a²+32-16a-3a²-75-30a-4a+4=
-a²-50a-39
( √4+3a)²=
( √4+3a)( √4+3a)
4+3a√4+3a√4+9a²
4+9a²+6a√4
(2x- √25 )²=
(2x- √25 )(2x- √25 )=
4x² -2x√25 -2x√25 +25
4x² + 25 -4x√25
(-4-b√9 )²=
(-4-b√9 )(-4-b√9 )=
16+4b√9 +4b√9 +9b² =
16+8b√9 +9b²