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Y²-5Y+4=0 Y1=-(-5/2) - Square root of ((-5/2)²-4) Y1= 2.5 - Square root of 2.25 Y1 = 1 Y2=-(-5/2) + Square root of ((-5/2)²-4) Y2= 2.5 + Square root of 2.25 Y2 = 4 Y can be either 1 or 4
If you know the coordinates, use the Pythagorean Theorem: take the square root of ((x2 - x1)2 + (y2 - y1)2).If you know the coordinates, use the Pythagorean Theorem: take the square root of ((x2 - x1)2 + (y2 - y1)2).If you know the coordinates, use the Pythagorean Theorem: take the square root of ((x2 - x1)2 + (y2 - y1)2).If you know the coordinates, use the Pythagorean Theorem: take the square root of ((x2 - x1)2 + (y2 - y1)2).
y2 - 15 = 10Add 15 to each side:y2 = 25Take the square root of each side:y = +5y = -5
In real numbers there is no square root of -4x2 However, when using complex numbers where √-1 = i, then: √-4x2 = 2xi If you were asking, for example, with regard to the difference of two squares, eg y2 - 4x2, then you are actually finding the square root of 4x2 which is 2x, giving: y2 - 4x2 = (y + 2x)(y - 2x)