3. From the sum of 4+3X and 5-4X+2X², subtract the sum of 3x²-5x and -x²+2x+5
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The equation for the problem is
[(4 + 3x) + (5 - 4x + 2x2 ) - [ ( 3x2 - 5x) + ( -x2 +5)]
= [ 4 + 3x + 5 - 4x + 2x2 ] - [3x2 - 5x - x2 + 5]
= 4 + 3x + 5 - 4x + 2x2 - 3x2 + 5x + x2 - 5
= 2x2 - 3x2 + x2 + 3x - 4x + 5x + 4 + 5 - 5
= 4x + 4
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