Question

Using factor theorem, Show that (x+4) is a factor of (2x³ + 9x² + x - 12 ) .. Hence, factories the given expression completely...

Answer 1

please refer the following image for the ans.
hope this helps.

Answer 2

g(x)= x+4=0

x. =-4

p(x)= (2x³+9x²+x-12)

p(-4)= {2(-4)³+9(-4)²+(-4)-12}

= {(-64*2)+(9*16)-4-12}

= {(-128) + 144 -16}

= {144-128-16}

= {16-16}

= 0



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