1)
2)
3)(x-2)(x+2) - (x-5)² = x² - 4 - (x - 5)² = x² - 4 - (x² - 10x + 25) = x² - 4 - x² + 10x - 25 = 10x - 29
4)4(3y + 1)² - 27 = (4y + 3)(4y + 3) - 27= 16y² + 24y + 9 - 27 = 16y² + 24y - 18
(4y + 9)(4y - 9) + 2(5y + 2)(2y - 7) = 16y² - 81 + 10y² - 35y + 4y + 12 = 26y² - 31y - 65
So, the simplified equation is 16y² + 24y - 18 = 26y² - 31y - 65Rearranging, we get 10y² + 55y + 47 = 0Solving this quadratic equation, we get y ≈ -2.47 and y ≈ -1.9.
1)
(c-6)² = c² - 12c + 36(2a-3b)² = 4a² - 12ab + 9b²(5-a)(5+a) = 25 - a²(7x+10y)(10y-7x) = 100y - 49x²2)
v² - 49 = (v + 7)(v - 7)c² - 8c + 16 = (c - 4)²100 - 9x² = (10 + 3x)(10 - 3x)4a² + 20ab + 25b² = (2a + 5b)²3)
(x-2)(x+2) - (x-5)² = x² - 4 - (x - 5)² = x² - 4 - (x² - 10x + 25) = x² - 4 - x² + 10x - 25 = 10x - 29
4)
4(3y + 1)² - 27 = (4y + 3)(4y + 3) - 27= 16y² + 24y + 9 - 27 = 16y² + 24y - 18
(4y + 9)(4y - 9) + 2(5y + 2)(2y - 7) = 16y² - 81 + 10y² - 35y + 4y + 12 = 26y² - 31y - 65
So, the simplified equation is 16y² + 24y - 18 = 26y² - 31y - 65
Rearranging, we get 10y² + 55y + 47 = 0
Solving this quadratic equation, we get y ≈ -2.47 and y ≈ -1.9.