The roots of the following quadratic equation- x 2-15 are-A- x-15B- x- 15C- x-15 or x-15D- x-15

The correct option is C x = √15 or x = √15 We'll obtain two values of x here, x= √(1)5 or x = √(1)5, because on squaring both √(1)5 and √(1)5, we'l ...

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Standard X

Mathematics

Solving a Quadratic Equation by Completion of Squares Method

The roots of ...

Question

The roots of the following quadratic equation: $x^{2} = 15$ are:

x= √15

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x= - √15

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x = √15 or x = - √15

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x = ± 15

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Solution

The correct option is C
x = √15 or x = - √15

We'll obtain two values of $x$ here,

$x = - \sqrt{1} 5$ or $x = \sqrt{1} 5$ , because on squaring both $\sqrt{1} 5$ and $- \sqrt{1} 5$ ,
we'll get 15.

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The roots of the following quadratic equation: x2=15 are:

The correct option is C x = √15 or x = - √15 We'll obtain two values of x here, x=−√15 or x=√15, because on squaring both √15 and −√15, we'll get 15.

The roots of the following quadratic equation: $x^{2} = 15$ are:

The correct option is C
x = √15 or x = - √15

We'll obtain two values of $x$ here,

$x = - \sqrt{1} 5$ or $x = \sqrt{1} 5$ , because on squaring both $\sqrt{1} 5$ and $- \sqrt{1} 5$ ,
we'll get 15.