(X+4)(x+6)=48

Solution for (X+4)(x+6)=48 equation:

(X+4)(X+6)=48

We move all terms to the left:

(X+4)(X+6)-(48)=0

We multiply parentheses ..

(+X^2+6X+4X+24)-48=0

We get rid of parentheses

X^2+6X+4X+24-48=0

We add all the numbers together, and all the variables

X^2+10X-24=0

a = 1; b = 10; c = -24;
Δ = b2-4ac
Δ = 102-4·1·(-24)
Δ = 196
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{196}=14$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(10)-14}{2*1}=\frac{-24}{2}
=-12
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(10)+14}{2*1}=\frac{4}{2}
=2
$