Simplify: (2x2 − 9x + 3) + (−7x2 + 4x − 2)
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( 2x^2 - 9x + 3 ) + ( -7 x^2 + 4x - 2 )
= 2 x^2 - 9 x + 3 - 7 x^2 + 4 x - 2
= 2 x^2 - 7 x^2 - 9 x + 4 x + 3 - 2
= x^2 ( 2 - 7 ) - x ( 9 - 4 ) + 1
= -5 x^2 - 5 x + 1
= -( 5 x^2 + 5 x - 1 )
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= 2 x^2 - 9 x + 3 - 7 x^2 + 4 x - 2
= 2 x^2 - 7 x^2 - 9 x + 4 x + 3 - 2
= x^2 ( 2 - 7 ) - x ( 9 - 4 ) + 1
= -5 x^2 - 5 x + 1
= -( 5 x^2 + 5 x - 1 )
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