add 3 x ² + 5x - 4 ; 8 x - 2x²+11
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Answer:
x=1 is correct answer of first
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Solution:
(1) 3x2 + 5x - 4; 8x - 2x2 +11
= (3x²+5x-4)+(8x-2x²+11)
= 3x²+5x-4+8x-2x²+11
= 3x²-2x²+5x+8x-4+11
= x²+13x+7
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