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How to expand brackets?

Expand 5(x - 4)

To expand the brackets, you must mutilpy the number outside the bracket by everything inside.

Step 1)  5 x x  =  5x

AC
Answered by Andy C. Maths tutor
14713 Views

Factorize completely x^3 - 6x^2 + 11x - 6

Let f(x) = x^3 - 6x^2 + 11x - 6.

Try x = 1:   f(1) = 1 - 6 + 11 - 6 = 0

So x - 1 is a factot of f(x).

Try x = 2:   f(2) = 8 - 24 + 22 -...

KW
Answered by Kai W. Maths tutor
22270 Views

How do I find the angle between 2 vectors?

First, we need to recall 2 basic definitions of vector operations:

The dot product is defined on vectors u=[u1, u2,...un] and v...

CH
Answered by Christopher H. Maths tutor
5422 Views

How to find the roots of a Quadratic Equation by Factorising?

Suppose you have a quadratic equation: x+ 5x + 6

You are told it has TWO REAL ROOTS and you are t...

JF
Answered by Joshua F. Maths tutor
6500 Views

How do I solve fractions with unknowns in the denominators?

To solve the equation: (5x+3)/(x) + x = 1, where (x) is the denominator, we have to convert the equation into an equation without any denominators.

To do this, we multiply each variable by (x)...

SA
Answered by Sophie A. Maths tutor
5959 Views

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