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Find the value of 9^(-1/2)

Find the value of 9 -1/2 . For this question we need to know indices rules. We apply two rules here as the power is negative and because it's a fraction. First, let's tackle the negative power rule. When the...
JY
Answered by Janifa Y. • Maths tutor
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Find the two points of intersection of the graphs y=x2 and y=x+2.

We know the presence of the quadratic means there must be two solutions for x. We can solve this problem by treating the formulas for the graphs as simultaneous equations. We can substitute in the formula fo...
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Answered by Sareena H. • Maths tutor
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1)Simplify sqrt 98 - sqrt 32, givimg your answer in the form k sqrt 2 where k is an integer.

7sqrt2-4sqrt2=3sqrt2
Answered by • Maths tutor
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How would I differentiate something in the form of (ax+b)^n

To tackle this type of question you would need to differentiate by substitution by implying the chain rule.If we substitute ax+b for a single character,lets say q , the expression becomes q^n which is easier...
Answered by • Maths tutor
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Can you teach me how to rationalise the denominator of an algebraic expression?

You may be asked to rationalise the denominator of an algebraic expression if it contains a surd in the denominator - such as a 1/2 . They can get slightly more complex than this though! What it is asking fo...
Answered by • Maths tutor
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