Answer:
Step-by-step explanation:
Add 1 and subtract 1, so that the expression won't change.

(a² - b²) = (a+b)(a - b)
Here a = x² - (1/x²) and b = 1
Answer:
9 x 9 x 9 x 9 x 9
Step-by-step explanation:
9^5 = 9 x 9 x 9 x 9 x 9
Answer:
Below in bold.
Step-by-step explanation:
4x + y = 9
Let's put x = 0 then:
4(0) + y = 9
0 + y = 9
y = 9
So one. ordered pair that is a solution is (0, 9)
The answer is 7 < x < 13.
5 < x - 2 < 11
Add 2 in all sections:
5 + 2 < x - 2 + 2 < 11 + 2
7 < x < 13
Answer:
2 *( 3+7-9) =(1+5) - ( 8 -4 )
Step-by-step explanation:
2 _( 3_7_9) = (1_ 5) _ ( 8 _4 )
I just started playing with things
2 *( 3+7-9) = (1_5 ) _ ( 8 _4 )
2 * (10-9)
2*1
So the left side is 2
Now to make the right side 2
(1+5) - ( 8 -4 )
6 - 4
2