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How do you expand Double Brackets?

For this we will use the FOIL Method. This stands for Front, Outside, Inside, Last. This helps us to check that we have multipled everything. For example, lets use (x+1)(2x+3): Multiply the first terms: x 2x...
HR
Answered by Harry R. • Maths tutor
4739 Views

When do I use the subjunctive?

The first important thing to note about the subjunctive is that it is a mood, not a tense.It is mainly used to show the speaker's attitudes or feelings in the sentence There are several situations when the s...
MS
Answered by Matt S. • Spanish tutor
2805 Views

Solve for x, between 0 and 360 degrees, 4cos2 (x) + 7sin (x) – 2 = 0

Solve for x, between 0 and 360 degrees, 4cos 2 (x) + 7sin (x) – 2 = 0 The way to approach this problem is to understand the relation that: sin 2 (x) + cos 2 (x) = 1 That equation can be rearranged to give: c...
LZ
Answered by Luke Z. • Maths tutor
12556 Views

(4x + 3)/(x + 1) + 2 = 8

(4x + 3)/(x + 1) + 2 = 8 Firstly minus the 2 from both sides (4x + 3)/(x + 1) = 6 Then multiply both sides by the denominator (x + 1) 4x + 3 = 6(x + 1) Expand the brackets. 4x + 3 = 6x + 6 Rearrange the equa...
JW
Answered by Jessica W. • Maths tutor
3643 Views

Circle C has equation x^2 + y^2 - 6x + 4y = 12, what is the radius and centre of the circle

The equation of a circle is (x-a)^2 + (y-b)^2 = r^2, where (a,b) is the centre of the circle, and r is the radius. To condense our equation into this form we have to use the technique of completing the squar...
HB
Answered by Haren B. • Maths tutor
11679 Views