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Fully expand (2x+4)(4x-3).

Answer:

8x2+10x-12

Explanation:

It is really important that every 'term' is multiplied by every other 'term'. A 'term' doens't just refer to the number but also to the sign...

MH
Answered by Matilda H. Maths tutor
3716 Views

Three forces (4i + 7j)N, (pi +5j)N and (-8i+qj) N act on a particle of mass 5 kg to produce an acceleration of (2i - j) m s 2 . No other forces act on the particle. Find the resultant force acting on the particle in terms of p and q. THEN find p and Q

Three forces : (4i + 7j)N , (pi +5j)N , (-8i+qj) N Mass = 5 kg acceleration = (2i - j) A.Collect like terms (4+p-8)i +(7+5+q)j = (-4+p...

SL
Answered by Shane L. Maths tutor
9199 Views

When you integrate, why do you need to add a +C on the end?

Integration can be used to undo differentiation. So if you had an equation that was y=5x+2 and differentiated to get dy/dx=5. When you integrate it you would only get y=5x, so the +2 is lost, to make sure...

KM
Answered by Katie M. Maths tutor
3773 Views

How can I apply trigonometry rules to an isosceles triangle?

First, split the isosceles triangle down the middle to create a right angled triangle. Then label the opposite, hypotenuse and adjacent. The hypotenuse will be the longest side of the triangle, the opposi...

GW
Answered by Gwen W. Maths tutor
33850 Views

factorise the quadratic: v^2+20v+19

Recap defintions: factorise essentially means making the equation simpler by finding the common factors. 

This is a simple quadratic because the first term has a coeffecient of 1. therefore we know...

TL
Answered by Taylor L. Maths tutor
3868 Views

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