How do you solve #p^ { 2} + p - 20= 0#?

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How do you solve #p^ { 2} + p - 20= 0#?

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Answer 1 · 2016-10-30T05:43:54

Answer is # p=-5#, or # p=4 #.

Explanation:

#p^2+p-20=0#
#:.p^2+5p-4p-20=0#
#:.p(p+5)-4(p+5) ##=0#
#:.(p+5)*(p-4)=0#
#:.#Either, #(p+5)=0#, or #(p-4)=0#.
#:.#Either, # p=-5#, or # p=4 #. (answer).

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How do you solve #p^ { 2} + p - 20= 0#?

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