Solve this 2x³+7x²+5x+6
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Answer: (x+2) (x-3) (2x-3)
Step-by-step explanation:
2x³ + 7x² - 3x - 18
put x = -2
we get
2(-2)³ + 7(-2)²-3(-2)-18
= -16+28+6-18
= 34-34 = 0
hence x = -2 is root of 2x + 7x - 3x - 18
hence
2x³ + 7x² - 3x - 18 = (x+2)(2x²+3x-9)
=(x+2)(2x²+6x-3x-9)
=(x+2){2x(x+3)-3(x+3)}
=2x³+7x²-3x-18 = (x+2) (x-3) (2x-3)
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Answer:
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