If A= 3x2-7x-8, B=x²-8x-5 find A+2B
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Answer:
A = 3x^2 - 7x - 8
B = x^2 - 8x - 5
A + 2B = 3x^2 - 7x - 8 + 2(x^2 - 8x - 5)
=> 3x^2 - 7x - 8 + 2x^2 - 16x - 10
=> 5x^2 - 23x - 18
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