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(2x-5) (2x -5)
4x² - 10x -10x+25
4x² -20x + 25
2.
(2a + 4b -3c) - (a - b + c)
2a + 4b - 3c -a + b -c
a + 5b - 4c
-3 + 5(4) - 4(-5)
-3 + 20 + 20
17
3.
4(2x-5y)-5(x+3y)
8x - 20y -5x - 15 y
3x - 35 y
4.
p²-3pq + 2q²
(-3)² - 3 (-3)(2) + 2(2)²
9 - (-18) + 8
35
5.
a - 2b
(4x²-3x) - 2(5x - x²)
4x² - 3x - 10x + 2x²
6x² - 13 x
2.(2a+4b-3c)-(a-b+c)=(2(-3)+4(4)-3(-5))-(-3-4+(-5))=(-6+16+15)-(-12)=(-6+31)-(-12) = -6+31+12=37
3. 4(2x-5y)-5(x+3y)=8x-20y-5x-15y=8x-5x-20y-15y=3x-35y
4. 2p-3pq+2q²=2(-3)-3(-3)(2)+2(2)²=-6+18+8=32
5. 4x²+3x-2(5x-x²)=4x²+3x-10x+2x²=4x²+2x²+3x-10x=6x²-7x