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Factorise the equation below (1)

(1) x 2 + 15x + 56 = 0 56 = 1 x 56, 2 x 26, 4 x 14, 7 x 8 7 + 8 = 15 Hence, factorised equation is (x + 7)(x + 8) = 0
FT
Answered by Fraser T. • Maths tutor
3662 Views

Multiply 0.03 and 10.1.

First we have 0.03 x 10.1, multiply without decimal points: 3 x 101 = 303 Since there are 2 decimal places 0.03 and 10.1 has 1 decimal place the answer will have 3 decimal places : 0.03 x 10.1 = 0.303
MS
Answered by Mira S. • Maths tutor
4184 Views

Solve the equation 7 - 4x = x + 8.

First we add up all the 'x' terms. So the equation 7 - 4x = x + 8 becomes 7 - 4x - x = x +8 - x => 7 - 5x = 8. Now we can do the same with the other terms. The equation now becomes 7 - 5x - 7 = 8 - 7 =&gt...
MS
Answered by Mira S. • Maths tutor
4318 Views

When (x – 2)^2 + 7 has a minimum value, what is the value of x?

First, expand (x-2) 2 : = (x-2)(x-2), = x 2 - 2x - 2x + 4 = x 2 - 4x + 4 Add on the +7: = x 2 - 4x + 11 complete the square = (x - 2) 2 - 4 + 11 = (x - 2) 2 + 7 when the graph has a minumum value, (x - 2) = ...
TL
Answered by Tom L. • Maths tutor
7849 Views

How do I calculate the gradient of a non linear equation at a given point?

As we know, to find a gradient in a linear function, we have to calculate the difference in the objective function (usually y) by the difference in the choice variable (commonly x), you may know this as rise...
ML
Answered by Milo L. • Maths tutor
6204 Views