multiple the following mentally (x+4) (x+5)
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Answer:
(x+4) (x+5)
x(x+5)4(x+5)
[tex] {x }^{2} + 5x + 4x + 20 \\ {x}^{2} + 9x + 20 [/tex]
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Answer:
x^2+9x+20
Step-by-step explanation:
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