Year 9 Algebra

Question 1

How to expand triple brackets?

Answer 1

Expand 2 first, then use the expanded one with the third

Question 2

Equation for a quadratic

Answer 2

ax²+bx+c

Question 3

I’m doing noted on factorising quadratic from yr10 cos those notes are easier to understand

Answer 3

Yeah

Question 4

Actually
How to factorise by pairing?

Answer 4

Split into two parts, ‘bracketise’ the common bit on both parts, the merge them together

That’s really hard to understand so here’s an example

xy + 3x - 2y - 6
= x(y+3) -2(y+3)
= (y+3) (x-2)

Question 5

Pythagoras theorem equation?
Or
Equation for hypotenuse of RAT

Answer 5

a²+b²=c²
Hypotenuse is c²

Question 6

Where else can pythagaros theorem be applied to

Answer 6

Cones