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Solve x^2+4x-5=0

Two approaches.1.Note that the equation is a quadratic equation, and can thus be solved per the quadratic formula, in which the solutions are given to be (-b+-sqrt(b^2-4ac))/2a.Plugging in the values from th...
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Answered by Samuel H. • Maths tutor
4927 Views

Solve the equation: x^2 +8x + 12 = 0

This is a classic GCSE-style equation :) 1) Always write out the original equation for clarity (and so that you don't have to look back at the question constantly) :)x^2 + 8x + 12 = 02) Notice that this is q...
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Answered by Obaid U. • Maths tutor
7043 Views

Solve the simultaneous equations E.g. 2x + y = 18 and x − y = 6.

Simultaneous equations can be solved in many ways. The two main ways are "solving for x and y" and the other is "substituting for x and y". Because in this example we are given "line...
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Answered by Adil F. • Maths tutor
5642 Views

Solve the following quadratic: x^2 -5x +6=0

Step 1: factorise Find two numbers which add to make -5 and multiply to make 6--- -3 and -2(x-3)(x-2)=0 Step 2: recognise solutionsTo make the left hand side equal the right hand side, we can make one of the...
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Answered by Rhiannon H. • Maths tutor
4796 Views

What is the gradient of the curve 3x^3 + 7x at the point x=3?

The gradient or the slope of a curve is defined as the change in the y direction over the change in the x direction (dy/dx). In order to calculate a formula for the gradient of a curve we must differentiate ...
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Answered by Junaid K. • Maths tutor
3682 Views