Remark
You'll see it a whole lot easier if you make a substitution so that it looks like something you have already seen
Solution
let y = x^2
x^4 = x^2 * x^2
x^4 = y * y
x^4 = y^2
Now the expression becomes
y^2 + 8 y - 9 = z
(y + 9)(y - 1) = z
Now put the x^2 back in.
(x^2 + 9) ( x^2 - 1) = z
x^2 - 1 becomes x + 1 and x - 1. At this level x^2 + 9 can't be factored.
Answer
(x^2 + 9) (x + 1)(x - 1)
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Step-by-step explanation:
hope it helps you!!!!!!!!
Answer:
x = -1
Step-by-step explanation:
Given: 
Solve for x, When: 
Step by step:
Answer:
When you distribute the 7 to each set you get 14-21n and 14-21n
Step-by-step explanation:
