Solve the equation. Give exact solutions. then approximate the solution to the nearest hundredth, if necessary.
2x^2 = 20
2006-12-07 12:51:39 · 3 answers · asked by SICK MY DUCK! 1 in Science & Mathematics ➔ Mathematics
You need to get x by itself. Since the x is being squared, but the coefficient of 2 isn't, get rid of the 2 first. Because a coefficient of 2 means that x^2 is being multiplied by 2, you need to divide by 2 to get rid of it. Be sure to divide both sides!
2x^2 = 20.
x^2 = 10.
Now x is just being squared, so you need to square root each side, because that is the opposite operation of being squared.
x^2 = 10.
x = sq.rt(10)
Just plug that in your calculator.
2006-12-07 12:57:27 · answer #1 · answered by Stephanie 2 · 0⤊ 0⤋
2x^2=20
2x^2=2.10 divide each side by 2
x^2=10 square root both sides
x= â10
2006-12-07 20:57:37 · answer #2 · answered by che_karlos 2 · 0⤊ 0⤋
x = +/- sqaureRoot(10)
Start/All Programs/Accessories/calculator
type "10"
click square root button
2006-12-07 20:54:40 · answer #3 · answered by Anonymous · 0⤊ 0⤋