Question

What is the value of x if x * x + 2x - 35 = 0?

Answer 1

x = 5, -7

Explanation:

`x^2+2x-35=0`

`\mathrm{Solve\;with\;quadratic\;formula}`

`x_(1,\:2)=(-2\pm √(2^2-4\cdot \:1\cdot \left(-35\right)))/(2\cdot \:1)`

`x_(1,\:2)=(-2\pm \:12)/(2\cdot \:1)`

`\mathrm{Separate\:the\:solutions}`

`x_1=(-2+12)/(2\cdot \:1),\:x_2=(-2-12)/(2\cdot \:1)`

`x=(-2+12)/(2\cdot \:1):5`

`x=(-2-12)/(2\cdot1):-7`

`\mathrm{The\:solutions\:to\:the\:quadratic\:equation\:are:}`

`x=5` and
`x=-7`

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