<span>Factor out 2
x^2 +4x -6 = 0
Take half middle coefficient and square it:
x^2 +4x +4 -6 = 4
(x+2)^2
= 10
x+2
= sqrt(10)
x
= +-sqrt(10) -2</span>
Answer:
$83,320
Step-by-step explanation:
The formula to apply here is;

where;
A=Amount at the end
P=the amount to invest/principal
r=rate of interest as a decimal
n=number of compoundings in a year
t=time in years
Given that;
A=$400,000
P=?
r=8%=0.08
n=2
t=20
Substitute values in equation

P=$83,320 (to the nearest dollar)
Answer:
x^2-5x + 6
Step-by-step explanation:
Here, we want to expand the given expressions
To do this, we multiply each term in the first bracket with each term in the second
We then proceed to collect like terms
We have this as;
x(x-3) - 2(x-3)
= x^2 - 3x -2x + 6
= x^2 -5x + 6
Divide the total by 2 and you'll get A and B = 31,364