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Solve 3x^2 + 6x – 2 = 0 Give your solutions correct to 2 decimal places.

3x 2 + 6x - 2 = 0 When we have a polynomial with powers of x up to 2 (a quadratic equation) we can apply the quadratic formula : -b ± root(b 2 -4ac)/2a where your equation is in the form ax 2 + bx + c 0 so a...
MS
Answered by Maya S. • Maths tutor
9575 Views

(a) show that 3/10 + 2/15 = 13/30 (b) show that 2 5/8 ÷ 1 1/6 = 2 1/4

(a) In order to add or subtract any fractions, they must first have a common denominator. For this example, I will take this to be 30. Looking at 3/10: in order to change the denomintor to 30, we must multip...
FH
Answered by Florence H. • Maths tutor
7708 Views

How do I divide fractions?

If you have a fraction divided by another fractions things can get tricky, but there is an easy way to avoid getting triple decker fractions! Have a look at this example: (1/2) / (2/5) = (1/2) x (5/2) = (5/4...
MR
Answered by Molly R. • Maths tutor
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solve the following equation: 7x + 8 = 2(6x -2)

first of all it is best to get rid of the brackets. You do this by times each component in the bracet by the number on the outside in this case it is 2. 7x + 8 = 12x - 4 then you want to get all the x's on o...
KB
Answered by Kay B. • Maths tutor
3620 Views

How do I solve a simultaneous equation like this: 2x-5y=3, 3x+2y=14 ?

Solving a simultaneous equation finds the point(s) where two lines on a graph intercept. Therefore, one way of solving the equations is to plot the two lines onto the same graph and find the coordinates of t...
EG
Answered by Ellie G. • Maths tutor
10370 Views