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Solve x^2 - 2x - 15 = 0

This is a simple quadratic equation. To answer the question, it must first be factorised before it can be solved. To do this, two numbers need to be found which multiply to make the constant term and have a ...
JK
Answered by Jack K. • Maths tutor
19022 Views

Make t the subject of this equation: x=4t-7

x=4t-7 take the -7 over first, swapping the sign as it passes over the equals sign x+7=4t 4t = 4*t so we need to divide the other side of the equation by 4 1/4(x+7)=t
LC
Answered by Louise C. • Maths tutor
3780 Views

Find the value of x in the equation x^2 - 2x + 1 = 0

Factorise: X^2 means 2 brackets (x )(x )=0 factors of 1 = 1 (x 1)(x 1)=0 to get minus 2 you must do (-1) + (-1) so (x-1)(x-1)=0 therefore x-1=0 and x=1
LC
Answered by Louise C. • Maths tutor
4257 Views

How do you find the next number in a given sequence?

First, you look for the difference between every number in the sequence, ie. what do you add to the first number to equal the second number? If you find that the difference is the same for every number, then...
EM
Answered by Eleanor M. • Maths tutor
12529 Views

Tim stretches by leaning against a pole that is 1.5 metres tall and at a right angle to the floor. Tim is standing 0.5 metres away from the pole, how tall is Tim; leaving your answer in terms of metres? (2.d.p)

This can be solved using Pythagoras. We know that the pole is 90 degrees to the floor so the height of the pole is the opposite side. The distance between Tim and the pole is therefore the adjacent and hence...
MS
Answered by Morgan S. • Maths tutor
3793 Views