Answer:
x = 5 or –5
Step-by-step explanation:
x^2 25
------- = ------
x+5 x+5
Using cross products
x^2 (x+5) = 25 (x+5)
Divide each side by (x+5)
x^2 (x+5)/(x+5) = 25 (x+5)/(x+5)
x^2 = 25
Take the square root of each side
sqrt(x^2) = ±sqrt(25)
x = ±5
25% decrease.
3/4=75%
100%-75%=25% decrease.
change f(x) to 0 than 7*2x=14x
0=14x-28x+21
0=-14x+21
-21=-14x
x=3/2
4mm
-3x² + 7x + 2 + x³ - x² -9
= x³ -3x² -x² + 7x +2 -9
= x³ -4x² + 7x -7
