Top answers

Expand and simplify: 5(x +y) + 3(4x-2y)

I'd first explain how expansion works, and that the first step is to expand the first bracket as shown below:The first bracket expands to: 5 x + 5 y which equals 5x + 5yThe next step I'd show would be the ex...
HJ
Answered by Harvey J. • Maths tutor
4647 Views

Simplify fully (x^2 + 3x)/(4x + 12)

You should begin by factorising the numerator and denominator, in order to determine what would go into both parts of the fraction.As you can see, x 2 and 4x have 'x' in common, and 3x and 12 have '3' in com...
MJ
Answered by Matthew J. • Maths tutor
4546 Views

Simplify completely: 3x^2 - 14x +5 /2x^2 -10x

Ideally you're aiming to find common factors on both sides of the fraction that cancel out. Firstly we can break this question down into two bits. First bit is factorising 3x^2 -14x+5. Factorizing this would...
DB
Answered by Diya B. • Maths tutor
3302 Views

Write x^2 + 6x - 10 in the form ((x+a)^2)+b?

To find the value of a divide the coeffecient of x. Here this would be 6/2 which = 3. If we were to expand (x + 3)^2 + b this would give us:x^2 + 3x +3x + 3^2 +b which simplifies to x^2 + 6x + 3^2 + b. If we...
GG
Answered by Gunalini G. • Maths tutor
15215 Views

What is the function of the mitochondria?

Mitochondria are organelles which are present in all cells. They are the sites for cellular respiration which provides an organism with energy.
Answered by • Biology tutor
4925 Views