The area of the rectangular UAE flag is x2+5x+6. Check whether (x+3) is a dimension of the flag
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Basically they want you to check whether x+3 is a factor of the given quadratic. If x+3 is a factor then if you substitute x=-3, the quadratic should be equal to zero.
(-3)^2+(-3)5+6=9-15+6=15-15=0.
So, it is a factor of the quadratic ( if you actually factorize the quadratic, it'd come out as (x+2)(x+3). Thus x+3 is a dimension of the flag.
(-3)^2+(-3)5+6=9-15+6=15-15=0.
So, it is a factor of the quadratic ( if you actually factorize the quadratic, it'd come out as (x+2)(x+3). Thus x+3 is a dimension of the flag.
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