4x2 - 30 = 34
Add 30 to both sides
4x2 = 64
Divide both sides by 4
x2 = 16
Take the square root of both sides:
x = 4 or -4
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4x2 - 30 = 34 ⇒ 4x2 = 64 ⇒ x2 = 16 ⇒ x = 4 or -4
The solutions to the quadratic equation are: x = -1 and x = 6
x - 18 = 34 just add 18 to both sides... X - 18 + 18 = 34 + 18 x + 0 = 52 x = 52
It works out that the solutions are: x = 3 and y = 2
There is an infinite number of solutions because x is not determined.