1) x(1-x)+(x-1)2 2) (x-3)2 - x2 + 10x -7
3) (x+2)2 - ( x-3 )( x+1) 4) (x+4)(x-2) - (x-3)2
5) (x-2)2 + (x-1)(x+5) 6) (x+3) (x-3) - x(23+x)
7) (1 - 2x)( 5-3x ) + (4-x)2 8) (x-2)(x+2)-(x-3)(x+1)
9) (x+1)2 + (x-2)(x+2) -4x 10) (x+2)2 - (x+3)(x-3)+10
11) (x+4)2 +(x+5) (x-5) - 2x (x+1) 12) (x-1)2 - (x-4)(x+4)+(x+3)2
13) (x-1)2 - 2(x+3)(x-3) + 4x(x-4) 14) (y-3)(y+3)(y2 + 9) - (y2 + 2) (y2 - 2)
1: \(x\left(-x+1\right)+\left(x-1\right)^2\)
\(=-x^2+x+x^2-2x+1\)
=-x+1
2: \(\left(x-3\right)^2-x^2+10x-7\)
\(=x^2-6x+9-x^2+10x-7\)
=4x+2
3: \(\left(x+2\right)^2-\left(x-3\right)\left(x+1\right)\)
\(=x^2+4x+4-\left(x^2+x-3x-3\right)\)
\(=x^2+4x+4-x^2+2x+3=6x+7\)
4: \(\left(x+4\right)\left(x-2\right)-\left(x-3\right)^2\)
\(=x^2-2x+4x-8-\left(x^2-6x+9\right)\)
\(=x^2+2x-8-x^2+6x-9=8x-17\)
5: \(\left(x-2\right)^2+\left(x-1\right)\left(x+5\right)\)
\(=x^2-4x+4+x^2+5x-x-5=2x^2-1\)
6: \(\left(x+3\right)\left(x-3\right)-x\left(x+23\right)\)
\(=x^2-9-x^2-23x\)
=-23x-9
7: \(\left(-2x+1\right)\left(-3x+5\right)+\left(4-x\right)^2\)
\(=6x^2-10x-3x+5+x^2-8x+16\)
\(=7x^2-21x+21\)
8: \(\left(x-2\right)\left(x+2\right)-\left(x-3\right)\left(x+1\right)\)
\(=x^2-4-\left(x^2+x-3x-3\right)\)
\(=x^2-4-\left(x^2-2x-3\right)=x^2-4-x^2+2x+3=2x-1\)
9: \(\left(x+1\right)^2+\left(x-2\right)\left(x+2\right)-4x\)
\(=x^2+2x+1+\left(x^2-4\right)-4x\)
\(=x^2-2x+1+x^2-4=2x^2-2x-3\)
10: \(\left(x+2\right)^2-\left(x-3\right)\left(x+3\right)+10\)
\(=x^2+4x+4-\left(x^2-9\right)+10\)
\(=x^2+4x+14-x^2+9=4x+23\)
11: \(\left(x+4\right)^2+\left(x+5\right)\left(x-5\right)-2x\left(x+1\right)\)
\(=x^2+8x+16+x^2-25-2x^2-2x\)
=6x-9
12: \(\left(x-1\right)^2-\left(x-4\right)\left(x+4\right)+\left(x+3\right)^2\)
\(=x^2-2x+1-\left(x^2-16\right)+x^2+6x+9\)
\(=2x^2+4x+10-x^2+16=x^2+4x+26\)
13: \(\left(x-1\right)^2-2\left(x+3\right)\left(x-3\right)+4x\left(x-4\right)\)
\(=x^2-2x+1-2\left(x^2-9\right)+4x^2-16x\)
\(=5x^2-18x+1-2x^2+18=3x^2-18x+19\)
14: \(\left(y-3\right)\left(y+3\right)\left(y^2+9\right)-\left(y^2+2\right)\left(y^2-2\right)\)
\(=\left(y^2-9\right)\left(y^2+9\right)-\left(y^4-4\right)\)
\(=y^4-81-y^4+4=-77\)
