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2x + 3y = 8 and 3x + 2y = 7 find x and y

These are simultaneous equations. To solve them, we need to do something to these equations to that either the coefficents of x or y are the same. So multiply each equation by a suitable number, a good choic...
TK
Answered by Tara K. • Maths tutor
17619 Views

2x^2 - 16x + 32

Solution: x=4. This can be shown by factorisation or applying the quadratic formula.
NO
Answered by Nick O. • Maths tutor
4478 Views

How does Pythagoras Theorem work?

Pythagoras theorem works to find out an unknown side length of a right angles triangle (RAT) knowing the other two lengths. A RAT has 3 sides called a hypotenuse (longest side), and two smaller sides. We cal...
CB
Answered by Caitlin B. • Maths tutor
5745 Views

Factorise and simplify the following equation: (2x^2 + 5x + 3) / (x + 1)

Firstly, you must factorise the quadratic equation on the numerator of the fraction. Observe that the x^2 has a coefficient of 2 and the term with no x terms is 3. 3 can only be factorised by 1 and 3. Also, ...
MC
Answered by Molly C. • Maths tutor
6815 Views

Expand and simplify (2x+5)(x^2 + 3x -1)

The answer should be 2x 3 + 11x 2 +13x - 5 Remeber to multipy both brackets together, and collect like terms. (Watch out for the minus sign)
FP
Answered by Fraser P. • Maths tutor
5121 Views