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Factorise and solve x2 - 8x + 15 = 0

Factorise the quadratic into two brackets to make (x-3)(x-5)=0 Because the product of these brackets is zero then the value of one of the brackets must equal zero. In order for one of the brackets to have a ...
MS
Answered by Mohamed S. • Maths tutor
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Balance the chemical equation: AgI + Na2S → Ag2S + NaI

2 AgI + 1 Na 2 S → 1 Ag 2 S + 2 NaI Both sides of the equation need to have the same number of each element. We need to make sure that the amount of one element we have on one side of the equation is the sam...
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Answered by Mohamed S. • Chemistry tutor
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How are the cells lining the small intestine adapted to their function?

The purpose of the small intestine is to absorb nutrients from the food we eat. In order to achieve this the cells of the small intestine have adaptations to increase their ability to absorb. The cells that ...
AS
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Expand and simplify (x+2)(x+3)

Use the FOIL method to remember which components you need to multiply together. F = F irst two, O = O utside two, I = I nside two, L = L ast two. Then add your answers together and collect like terms to simp...
NS
Answered by Natasha S. • Maths tutor
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5w -3 = 3w + 15

5w -3 = 3w + 15 Need to get the numbers on one side, and letters on the other side. 5w = 3w + 15 + 3 5w - 3w = 15 + 3 2w = 18 w = 18/2 w = 9
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Answered by Hannah N. • Maths tutor
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