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What is completing the square?

What is completing the square? Completing the square is a way of rewriting quadratic expressions in a form that can help us interpret graphs and solve quadratic equations. It involves rewriting ax 2 + bx + c...
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Answered by Jack L. • Maths tutor
3310 Views

Write (x + 1)(x + 2)(x + 3) in the form ax³ + bx² + cx + d

Step 1: Multiply the first 2 brackets(x + 1)(x + 2) =x 2 + x + 2x + 2 =x 2 + 3x + 2 Step 2: Multiply the result with the third bracket(x 2 + 3x + 2)(x+3)x 3 + 3x 2 + 2x + 3x 2 + 9x + 6x 3 + 6x 2 + 11x + 6
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Answered by Anjum C. • Maths tutor
3164 Views

Draw the graph of, y = x^2 – 2x – 4

1)First, let's create a table of values for x and y. For this example, let's pick values of x ranging from -2 to +4.2) We will then input our values of x into the equation, and get a corresponding value of y...
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Answered by Adam D. • Maths tutor
6952 Views

Expand (x+3)(x+4)

When we come across questions like this, we expand by multiplying everything in the first bracket by everything in the second bracket. An easier way of doing this is rewriting the question like: x(3x+4) + 3(...
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Answered by Greg C. • Maths tutor
15912 Views

A sequence starts with the following terms... 2, 8, 14, 20... find the nth term

To find the "n" in this sequence we need to calculate the difference between the terms So the result will be... n+6
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Answered by Patricia C. • Maths tutor
6285 Views