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Question
H^{2}-7
Find the roots
H_{1}=-\sqrt{7},H_{2}=\sqrt{7}
Alternative Form
H_{1}\approx -2.645751,H_{2}\approx 2.645751
Evaluate
H^{2}-7
To find the roots of the expression,set the expression equal to 0
H^{2}-7=0
Move the constant to the right-hand side and change its sign
H^{2}=0+7
Removing 0 doesn't change the value,so remove it from the expression
H^{2}=7
Take the root of both sides of the equation and remember to use both positive and negative roots
H=\pm \sqrt{7}
\text{Separate the equation into }2\text{ possible cases}
\begin{align}&H=\sqrt{7}\\&H=-\sqrt{7}\end{align}
Solution
H_{1}=-\sqrt{7},H_{2}=\sqrt{7}
Alternative Form
H_{1}\approx -2.645751,H_{2}\approx 2.645751
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