Top answers

Maths
GCSE

Factorise and solve x2 - 8x + 15 = 0

Factorise the quadratic into two brackets to make (x-3)(x-5)=0 Because the product of these brackets is zero then the value of one of the brackets must equal zero. In order for one of the brackets to have...

MS
Answered by Mohamed S. • Maths tutor
8374 Views

Expand and simplify (x+2)(x+3)

Use the FOIL method to remember which components you need to multiply together. F= First two, O= O

NS
Answered by Natasha S. • Maths tutor
54347 Views

5w -3 = 3w + 15

5w -3 = 3w + 15 

Need to get the numbers on one side, and letters on the other side.

5w = 3w + 15 + 3 

5w - 3w = 15 + 3

2w = 18

w = 18/2

w = 9

HN
Answered by Hannah N. • Maths tutor
4264 Views

Ian's commute to work is 5km. He needs to be there by 9.00am. He travels at 10 km/h, what time does he need to leave home?

Answer is 8.30am Using the speed = distance/time reference the student would do distance/speed or 5/10 = 0.5 hours

IF
Answered by Isabelle F. • Maths tutor
3103 Views

work out: ( 4 × 10^3 )^2 + 3.5 × 10^7 and give your answer in standard form.

Whenever you have to solve an equation, you must always follow BIDMAS. This means that you should always start with expanding any Brackets, then look at any Indices, then Division, Multiplication, Additio...

JL
Answered by Jade L. • Maths tutor
5818 Views

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