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= p² + 2p² + 3p - 7p
= 3p² - 4p
= p(3p - 4)
b) (-2x²+3x+ 10) - (x² - 7x - 3)
= -2x² - x² + 3x + 7x + 10 + 3
= -3x² + 10x + 13
c) (5x² - x - 10) - (3x²+x-15)
= 5x² - 3x² - x - x - 10 + 15
= 2x² - 2x + 5
7p + 3p -2p^2 - 2 p^2
10 p - 4 p^2
b.x^2 - 7x - 3 - -2x^2 + 3x + 10
x^2 -(-2x^2 ) - 7x + 3x - 3+10
3 x^2 - 4x + 7
c. 5x ^2 - 3x^2 -x + x - 10 - 15
3x ^2 - x - 25