Expand and simplify (6x+9)(4x+7)
-
Using the "crabs claw" or "parrot beak" method, draw lines linking the two brackets (demonstrated on whiteboard)
-
6x x 4x = 24x2
-
6x x 7 = 42x
-
9 x 4x = 36x
-
9 x 7 = 63
Answer = 24x2 + 42x + 36x +63
= 24x2 + 78x + 63
JG
Related Maths GCSE answers
All answers ▸How do you rationalize the denominator of a fraction?
A price is decreased by 27% The new price is £1138.80 Work out the original price.
We have two straight lines AB and CD. The coordinates of A,B and C are A(1,3), B(5,9) and C(0,8). The point D lies on the line AB and is halfway between points A and B. Is the line CD perpendicular to AB?
There are only red , blue and purple counters in a bag. The ratio of the number of red counters to the number of blue counters is 3 : 17. If a counter is taken randomly the probability that it is purple is 0.2 Work out the probability for it to be red.