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Draw the graph y = x2 + 3x + 2

y = x2 + 3x + 2 Finding the y intercept:When x = 0, y = 2 Therefore y intercept is at (0,2)Finding x intercept:Method 1: Factorise y = x2 + 3x + 2 y = (x+1)(x+2)x intercepts are when...

Answered by George R. Maths tutor
2738 Views

How do you use the quadratic formula?

The equation for the quadratic formula is x = (-b +/- √(b^2 - 4ac))/2a for when the equation ax^2 + bx + c is equal to 0. When you have the equation ax^2 + bx + c, where a, b and c are gi...

Answered by Isla B. Maths tutor
1903 Views

Simplify: 5x + 8y - 3x + 9y

When you first come across algebra, it may be a bit tricky to get your head around as it involves more abstract concepts than we may have previously seen in maths. However, once you understand the basic p...

Answered by Katharine S. Maths tutor
2895 Views

Write sqrt(75) in simplified surd form.

First you want to find a square number that is a factor of 75. In this case it is 25, as 25 x 3 = 75 . With this information you can expand the surd into:sqrt(25) x sqrt(3)
As 5^2 = 25, this can beco...

Answered by Kate G. Maths tutor
3607 Views

Here are three expressions. b/a, a – b, and ab. When a = 2 and b = -6, which expression has the smallest value?

b/a = -6 / 2 = -3 .........a - b = 2 - (-6) = 8 ............ab = 2 x -6 = -12 ...............Therefore ab, -12, has the smallest value.

Answered by Tara M. Maths tutor
3649 Views

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