Question

A student says that it 5x^2 =20,then x must be

Answer 1

• I agree with the student.
• Justification:
• ${5x}^{2} = 20 \\ = > {x}^{2} = \frac{20}{5} \\ = > {x}^{2} = 4 \\ = > x = \sqrt{4} \\ = > x = 2$
• Therefore, x must be equal to 2.
• So his statement is right.

Hope you could get an idea from it.

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