Question

coloque na forma reduzida : -5x²=30x+40

Answer 1

- 5x² = 30x + 40

- 5x² - 30x - 40 = 0 ( -1)

5x² + 30x + 40 =0 ****

delta = ( 30)² - [ 4 * 5 * 40] = 900 - 800 = 100 ou +-V100 = +-10 ***

x = ( -30 +-10 )/10

x1 = -40/10 = -4 ***

x2 = -20/10 = -2 ***

Answer 2

-5x^2-30x-40=0. \{-1}. 5x^2+30x+40=0.