SOLUTION: I need to verify whether each equation is an identity or not by substituting -1, 0, and 1 for X.
Lesson 9.4 extra practice in the back of the book.
Problem #7. x^+4x+3=(
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Question 130039This question is from textbook Algebra 1
: I need to verify whether each equation is an identity or not by substituting -1, 0, and 1 for X.
Lesson 9.4 extra practice in the back of the book.
Problem #7. x^+4x+3=(x+1)(x+3)
This question is from textbook Algebra 1
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation
Plug in
Square -1 to get 1
Multiply
Combine like terms
Multiply. So the solution works
------------------------
Start with the given equation
Plug in
Square 0 to get 0
Multiply
Combine like terms
Multiply. So the solution works
---------------------------
Start with the given equation
Plug in
Square -1 to get 1
Multiply
Combine like terms
Multiply. So the solution works
--------------------------------------
Since more than one solution works, this equation is an identity
Note:
Another way you can prove that the equation is an identity is to foil the right side and simplify.
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