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Solve the equation "x^2 + 3x - 4 = 0".

Recognise that quadratic can be factorised: (x+4)(x-1)=0 This gives the solutions x=-4 and x=1 by inspection.
ZK
Answered by Zak K. Maths tutor
3977 Views

3x² = 75 Find the value of x.

First Simplify the numbers we know. Therefore we get: x 2 =75/3 which is the same as x 2 =25 Now find the square root of 25, which is 5 or -5. Therefore x=5 or -5
DB
Answered by Daniel B. Maths tutor
22907 Views

How do you expand brackets in a quadratic equation?

To expand the brackets in a quadtratic equation you should multiply whatever is outside the bracket by that which is inside the bracket. For example: 2(x+3) First multiply the first part of the bracket with ...
DH
Answered by Dorothy H. Maths tutor
5708 Views

Express the recurring decimal 0.2131313 as a fraction

Firstly, identify the recurring portion of the decimal. In this case, it is "13" set up an equation "x=0.2131313 You need to place the repeating section to the left of the decimal point. To do...
AN
Answered by Abhijit N. Maths tutor
17544 Views

How would you prepare for your Maths exam?

My advice is always past papers! There are only so many questions that the examiner can ask, and a lot of the time the questions have already turned up in previous papers. I would also just try to stay as ca...
AH
Answered by Ayesha H. Maths tutor
3791 Views