Monday

September 22, 2014

September 22, 2014

Posted by **ladybug Please Help!!** on Monday, June 18, 2012 at 8:45pm.

Eric stated that the solution would be (x+1)=54==> x=53 or (x-2)=54==> x=56

However at least one of these solutions fails to work when substituted back in the orginial equation. Why is that? Please help Eric to understand better, solve the problem yourself, and explain your reasoning.

Can someone please help me with this. I need this as soon as possible.

- Intermediate Algebra -
**bobpursley**, Monday, June 18, 2012 at 8:48pmEric is very dense, he does not understand the zero identity.

if a*b=0, either a or b or both are zero.

multiply it out:

x^2-x-2=54

x^2-x-56=0

(x-8)(x+7)=0

x=8, x=-7 in accordance with the zero identity.

**Answer this Question**

**Related Questions**

Algebra - In solving the equation (x + 3)(x + 1) = 48, Eric stated that the ...

algebra - 1. In solving the equation (x + 3)(x + 1) = 48, Eric stated that the ...

math - In solving the equation (x + 4)(x – 7) = -18, Eric stated that the ...

algbera - In solving the equation (x + 3)(x + 1) = 48, Eric stated that the ...

intermediate algebra - In solving the equation (x-1)(x+2)=30. Eric stated that ...

intermediate algebra - in solving the equation (x+4)(x-4)=9 eric stated the ...

Math - I don't understand how to solve this problem: In solving the equation (x...

Math - In solving the eqaution(x+4)(x-4),Eric stated thatthe solution would be x...

algebra - in solving the equation (x +2)(x - 2) = 32 eric stated the solution to...

algebra - solving the equation (x+4)(x-4)=9 Eric stated that the solution would ...