(t+2)(t-3)=(t+2)

Solution for (t+2)(t-3)=(t+2) equation:

(t+2)(t-3)=(t+2)

We move all terms to the left:

(t+2)(t-3)-((t+2))=0

We multiply parentheses ..

(+t^2-3t+2t-6)-((t+2))=0


We calculate terms in parentheses: -((t+2)), so:

(t+2)

We get rid of parentheses

t+2

Back to the equation:

-(t+2)


We get rid of parentheses

t^2-3t+2t-t-6-2=0

We add all the numbers together, and all the variables

t^2-2t-8=0

a = 1; b = -2; c = -8;
Δ = b2-4ac
Δ = -22-4·1·(-8)
Δ = 36
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{36}=6$
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-2)-6}{2*1}=\frac{-4}{2}
=-2
$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-2)+6}{2*1}=\frac{8}{2}
=4
$