## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with maths in songs

### So, who sang these lyrics?

April18

“I’m very well acquainted, too, with matters mathematical, I understand equations, both the simple and quadratical, About binomial theorem I’m teeming with a lot o’ news, With many cheerful facts about the square of the hypotenuse.” Answer in the Post Support and a clue below:

by posted under Uncategorized | tagged under , ,  |  Comments Off on So, who sang these lyrics?

#### Post Support

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)?]