Question

If x + 2 is a factor of x2 + ax + 2b and a + b = 4, then what is the value of a and b​

Answer 1

Step-by-step explanation:

x=-2

p(x)=x²+ax+2b

p(-2)=(-2)²+a(-2)+2b

=4-2a+2b

a= 4-b substitute this in a

4-2(4-b)+2b

4-8+2b+2b

-4+4b

there fore b=1

then a=4-b

4-1=3

therefore a=3

Answer 2

Here your Answer user.

Yes, it's not hard it's basic on concept.

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