Mathematics: Solving Quadratic Equations Directions: Solve the following quadratic equations using the quadratic formula. Show your work and all answers must be in simplest radical form. I a. x2 - 2x - 15 =0 b. x2 + 8x - 10 =0

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Solving Quadratic Equations Directions: Solve the

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28.04.2021

a) x= 5 or x= -3

b) x = -4 + $\sqrt{26}$ or -4 - $\sqrt{26}$

Step-by-step explanation:

a) $x^{2}$ - 2x - 15 =0

x = $\frac{-(-2) +\sqrt{(-2)^{2} - 4(1)(-15)}}{2(1)}$ or $\frac{-(-2) -\sqrt{(-2)^{2} - 4(1)(-15)}}{2(1)}$

x= 5 or x=-3

b) $x^{2}$ + 8x - 10 =0

x = $\frac{-(8) +\sqrt{(8)^{2} - 4(1)(-10)}}{2(1)}$ or $\frac{-(8) -\sqrt{(8)^{2} - 4(1)(-10)}}{2(1)}$

x = -4 + $\sqrt{26}$ or -4 - $\sqrt{26}$

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