## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with imaginary numbers

### Mind-Boggling Math Fact #1

January20

The sonnet “Like a Shakespearean sonnet that captures the very essence of love, or a painting that brings out the beauty of the human form that is far more than just skin deep, Euler’s Equation reaches down into the very depths of existence.” Stanford mathematician Keith Devlin wrote these words about this equation in a 2002 […]

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### All numbers are in our imagination…

August31

…even Imaginary Numbers! Yes, we were all taught in school that you cannot take the square root of a negative number. Quite right! Well, not quite right!! Actually, around a few hundred years ago (early 1600’s), someone (René Descartes actually) thought it might be really useful to be able to find the square root of a […]

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#### Post Support

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]