1) 2x−52x - 52x−5^2 - 2x+32x + 32x+3 = 0Expanding the square:4x2−20x+254x^2 - 20x + 254x2−20x+25 - 2x+32x + 32x+3 = 04x^2 - 20x + 25 - 2x - 3 = 04x^2 - 22x + 22 = 0
2) 9y^2 - 25 = 09y^2 = 25y^2 = 25/9y = ± 5/3
1) 2x−52x - 52x−5^2 - 2x+32x + 32x+3 = 0
Expanding the square:
4x2−20x+254x^2 - 20x + 254x2−20x+25 - 2x+32x + 32x+3 = 0
4x^2 - 20x + 25 - 2x - 3 = 0
4x^2 - 22x + 22 = 0
2) 9y^2 - 25 = 0
9y^2 = 25
y^2 = 25/9
y = ± 5/3