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Maths Puzzle
Numerical Ability
x^2+5x-6
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book Other Question
Quadratic equations:
Find two possitive numbers that differ by 2 and have a producy of 20.
The answer is -1 + squareroot of 21 and 1 + squareroot of 21.
How do I at the answer. (need steps)
problem:
the area of a circle is 25 meters. find the radius of the circle.
i solved to this point.
7.96 m (squared)= r (squared)
the books says answer is r=2.82
i need to understand the step on how they got the answer
thanks.