Question

Solve the given quadratic equation by using formula and give the answer correct to two decimal
places: 5(x + 1)2
+ 10(x + 1) + 3 = 0

Answer 1

Answer:

$5(x + 1) {}^{2} + 10(x + 1) + 3 = 0 \\ 5( {x}^{2} + 1 + 2x) + 10x + 10 + 3 = 0 \\ 5 {x}^{2} + 5 + 10x + 10x + 13 = 0 \\ 5 {x}^{2} + 20x + 18 = 0 \\ = d = {b}^{2} - 4ac = 0 \\ {20}^{2} - 4(5)(18) = 0 \\ 400 - 360 = 0 \\ 40 = d \\ \frac{ - b + \sqrt{d} }{2a} \\ \frac{ - (20) + \sqrt{40} }{10} = answer \\ \frac{ - b - \sqrt{d} }{2a} \\ \frac{ - (20) - \sqrt{40} }{10} = answer$

please mark as brilliant answer