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Solve (3x +1)/x + (2x-1)/3 = -3, giving x to two decimal places.

(3x+1)/x +(2x-1)/3 = (2x 2 + 8x + 3)/3x by cross multiplying. So equation becomes 2x 2 + 8x + 3 = -9x by multiplying both sides by 3x. Adding 9x to both sides gives 2x 2 + 17x + 3 = 0. Using a calculator, an...
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Answered by Jorge A. • Maths tutor
4609 Views

The normal price of the pair of shoes is £28. In a sale the price is reduced by 35%. What is the new price of the shoes?

If you take £28, what is 10% of 28? 2.8 So what is 30% of 28? You would do 2.8 x 3... which is? 8.4 And what is 5% of 28? You would half 2.8...so 1.4 Now add together 30% of 28 and 5% of 28... this gives 9.8...
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Answered by Seyta D. • Maths tutor
4479 Views

Solve x^2 = 4(x – 3)^2

To solve this equation we need to firast expand it. x 2 =4(x-3) 2 To do this we first expand the brackets. Remeber anything squared means times it by itself (x-3) 2 =(x-3)(x-3) =x 2 -6x+9 This makes the equa...
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Answered by Annabel M. • Maths tutor
27507 Views

how do you factorise a quadratic where there is a number in front of the x squared?

All quadratic equations have the form ax 2 + bx + c. If you take the equation: 2x 2 + 4x + 2 In this example a=2, b=3 and c=2 In order to factorise what we call a number (coefficient) higher than 1 in front ...
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Answered by Sagar M. • Maths tutor
32434 Views

How do I simplify 10/(3 root5)?

To simplify this fraction, you must rationalise the denominator (lower half of the fraction) to get rid of the surd. A surd is an irrational number that cannot be simplified further to remove the square root...
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Answered by Laura S. • Maths tutor
14023 Views