13-6x = (2x-5) ^2+3 what answer

13 - 6x = (2x - 5) 2 + 3 Step 1: Simplify both sides of the equation. - 6x + 13 = 4 x2 - 20x + 28 Step 2: Subtract 4x^2-20x+28 from both sides. - 6x + 13 - (4 x2 - 20x + 28) = 4 x2 - 20x + 28 - (4 x2 - 20x + 28) - 4 x2 + 14x - 15 = 0 Step 3: Use quadratic formula with a=-4, b=14, c=-15. x = - b ± √ b2 - 4a c 2a x = - (14) ± √ (14) 2 - 4 (-4) (-15) 2 (-4) x = - 14 ± √ - 44 - 8