Question

solve for X using the quadratic formula write your answer correct to 2 significant figures x minus 1 whole square - 3 x + 4 = 20

Answer 1

${x}^{2} - 3x + 4 = 20 \\ - 3x + 4 =19 \\ - 3x = 19 - 4 \\ - 3x = 15 \\ x = 15 \div ( - 3) \\ x = - 5$