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avatar+47 

Solve the equation below

6. Multiply: (x – 4)(x + 5)

(a) x2 + 5x - 20,

(b) x2 - 4x - 20,

(c) x2 - x - 20,

(d) x2 + x - 20.

 

 Sep 4, 2020
 #1
avatar+157 
0

\((x – 4)(x + 5) \implies x^2 - 4x + 5x -20 \implies \boxed {x^2 +x - 20}\)

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 Sep 4, 2020
 #2
avatar+230 
-1

(x-4)(x+5)=x^2+x-20=(d) is our final solution.

 Sep 4, 2020

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