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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
4597 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
5835 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
6927 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)
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Answered by Fraser P. • Maths tutor
5215 Views

y=2x+5 and y-x=8. Find x and y.

The expression (2x+5) has the same value as y, and so we can use (2x+5) instead of y in the second equation. This means that we are now just dealing with one variable (x) instead of two (x and y). If we make...
SR
Answered by Smriti R. • Maths tutor
12721 Views