(x − 5) 2
(x + 5)(x + 4)
(x – 5)(x + 3)
(x + 3) 2
Correct answer is B
x2+9x+20
Find the two numbers whose product is 20 and its sum is 9}
5x×4x=20x2
5x+4x=9x
(x2+5x)+(4x+20)
x(x+5)+4(x+5)=(x+5)(x+4)
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