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35 votes
35 votes
Can someone please explain this

Can someone please explain this-example-1
User Peter Szanto
by
2.4k points

1 Answer

25 votes
25 votes

Answer: x=-3-
√(7) or x=-3+
√(7)

Explanation:

f(x)=x+1. g(x)=x+5

(f * g)(x)=

f(x)*g(x)=

(x+1)(x+5)=

x^2+5x+x+5=x^2+6x+5

x^2+6x+5=3

x^2+6x+9=7 ==> Add 4 on both sides of the equation

(x+3)^2=7

x+3=
√(7)

x=-3+
√(7)

x+3=-
√(7)

x=-3-
√(7)

User Neomib
by
2.5k points