Answer:
x= -3 and x= 7
Step-by-step explanation:
first use FOIL method/(ice cream method)
F=first term
O=outer term
I=inner term
L=last term
(x+3)(x-7)=0
x+3=0 | x-7=0
transfer and change the sign of 3 and -7 like this x= -3 and x= 7
and that is the final answer
(x+3)(x-7)
F= (x)(x)=x²
O= (3)(-7)=-21
I= (3)(x)=3x
L= (x)(-7)=-7x
Add the I and L [3x-7x= -4x]
Back to the equation; you will know if the answer is correct if the equation and the result of the foil is the same
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Answers & Comments
Answer:
x= -3 and x= 7
Step-by-step explanation:
first use FOIL method/(ice cream method)
F=first term
O=outer term
I=inner term
L=last term
(x+3)(x-7)=0
x+3=0 | x-7=0
transfer and change the sign of 3 and -7 like this x= -3 and x= 7
and that is the final answer
(x+3)(x-7)
F= (x)(x)=x²
O= (3)(-7)=-21
I= (3)(x)=3x
L= (x)(-7)=-7x
Add the I and L [3x-7x= -4x]
Back to the equation; you will know if the answer is correct if the equation and the result of the foil is the same