Given the equation:
(x+7)3=9(x+7)transform:
Take common factor from the equation
(x+4)(x+7)(x+10)=0Because the right side of the equation is zero, then the solution of the equation is exists if at least one of the multipliers in the left side of the equation equal to zero.
We get the equations
x+4=0x+7=0x+10=0solve the resulting equation:
1.
x+4=0Move free summands (without x)
from left part to right part, we given:
x=−4We get the answer: x1 = -4
2.
x+7=0Move free summands (without x)
from left part to right part, we given:
x=−7We get the answer: x2 = -7
3.
x+10=0Move free summands (without x)
from left part to right part, we given:
x=−10We get the answer: x3 = -10
The final answer:
x1=−4x2=−7x3=−10