What are the solutions to the equation 4x^2+8x-21=0 ?

The solutions to the equation 4x^2+8x-21=0 are x= 3/2 ,x=-7/2

Find the zeros of 4x^2+8x-21=0

The zeros of 4x^2+8x-21=0 are x= 3/2 ,x=-7/2

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4 x^{2} + 8 x - 21 = 0

x = \frac{3}{2}, x = - \frac{7}{2}

Decimal Notation

x = 1.5, x = - 3.5

Solution steps

4 x^{2} + 8 x - 21 = 0

Solve with the quadratic formula

x_{1, 2} = \frac{- 8 \pm 8 ^{2} - 4 \cdot 4 ( - 21 )}{2 \cdot 4}

8^{2} - 4 \cdot 4 (- 21) = 20

x_{1, 2} = \frac{- 8 \pm 20}{2 \cdot 4}

Separate the solutions

x_{1} = \frac{- 8 + 20}{2 \cdot 4}, x_{2} = \frac{- 8 - 20}{2 \cdot 4}

x = \frac{- 8 + 20}{2 \cdot 4} : \frac{3}{2}

x = \frac{- 8 - 20}{2 \cdot 4} : - \frac{7}{2}

The solutions to the quadratic equation are:

x = \frac{3}{2}, x = - \frac{7}{2}

\frac{a ^{2}}{4} - ab + b^{2}

3 y - 6 = 15

25 = 7 + r

5 x^{2} + 9 x - 72

lo g_{14} (7) + lo g_{14} (2)

What are the solutions to the equation 4x^2+8x-21=0 ?
The solutions to the equation 4x^2+8x-21=0 are x= 3/2 ,x=-7/2
Find the zeros of 4x^2+8x-21=0
The zeros of 4x^2+8x-21=0 are x= 3/2 ,x=-7/2