Question

Use the quadratic formula to solve for x.
3x² +9x=-4

Answer 1

Explanation:

3x² +9x=-4 means : 3x² +9x+4=0

a=3 and b=9 and c= 4

Δ : b²-4ac Δ = 9²-4(3)(4) = 81 - 48 = 33

Solution of a quadratic equation ax² + bx + c = 0

x = [-b ± v(b² - 4ac)]/2a

Δ = b²- 4ac ........continu