To solve the radical equation PQ = √(y2 - y1)2, the expression inside the square root is simplified step-by-step: (y2 - y1)2 is expanded to (y2)2 - 2y2y1 + (y1)2, which is then simplified to -6 - 4 = -10 and -10 is simplified to √100 or 10. The key steps are to expand the expression inside the square root, combine like terms, and take the square root of the resulting expression. Certain calculator functions like square root and negative sign differ across calculator models.

1. A Radical Equation
PQ =
y²
y¹)²
PQ =
PQ =
PQ =
PQ =
(–2 – 4 = – 6 + – 3 –1 = – 4)
(– 6 x – 6 = 36 + – 4 x – 4 = 16)
or 7.2 (square root)
*Whereas adding two negatives produces a negative multiplying two negatives produces a
positive
To determine the square root of a number utilizing a calculator type the number into the
calculator and hit the “sqrt” button.
To get a negative sign (not a minus sign) on a calculator type the number to be made negative
and hit the “+/-” button.
Certain functions defer on some calculators as opposed to others.