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If expanded:

x^{2}  + 4x - x - 4

If simplified:

x^{2} + 3x - 4
1 5 1
Sulotion ? thanks :)
Use the FOIL method (First terms, Outer terms, Inner terms, and Last terms) and combine any like terms. The solution is already listed above :D
(x-1) (x+4)

Use the Foil method.First multiply the first terms x times x is x^2
Then proceed to outer terms x times 4 is 4x
Inner terms, -1 times x is -x
Last terms, 4 times -1 times 4 is -4

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