All Junior Cert Mathematics posts
• HELPPPP! sophiemk

ive been struggling with higher level maths and dropped to ordinary some weeks before the mocks, but still didn't get the results I wanted I post a few of the questions that I get confused and if anyone knows the answers please share, thankyou:)

Ok factorising I find so hard eg.

4xy-6x(squared)y(squared)

Multiplying equations....

5(3a-4b) ????

Like what's the difference of triangles eg scalic and icoseles

Solve....

Y(squared)-5y = 0

1. xxhelenxx

5(3a-4b)=

15a-20b

scalene triangles have sides and angle of different length and iscoseles have two sides the same length and two angles the same size

2. oskar123

5(3a-4b).....

multiply each term in the brackets by the number outside the brackets. i.e

5 multiplied by 3a and then 5 multiplied by 4b.

5 multiplied by 3a= 15a..... then 5 multiplied by -4b= -20b

so it should look like this:

5(3a-4b)

15a-20b

This might help

4. study person

ysquared - 5y=0 .......y is a factor of both so take y outside a bracket, y goes into ysquared y times, y goes into -5y -5 times

y(y-5)=0 ..........let each part being multiplied (ie. y and y-5) and let them equal 0

y=0 and y-5=0

so y=0 or y=5

same for your first sum, xy is a factor of both so put it outside the brackets:

xy(4+6xy)

5. study person

Does that help??

6. Dazzla16

Hi! @study person, you made a slight mistake with your explanation, because 2xy is also factor of both 4xy and -6x^2y^2. In addition to that, you wrote +6xy when it should have been -6xy. So this is how the expression will look if it was fully factorised: 2xy(2 - 3xy).

7. Dazzla16

Hi! @study person, you made a slight mistake with your explanation, because 2xy is also a factor of both 4xy and -6x^2y^2. In addition to that, you wrote +6xy when it should have been -6xy. So this is how the expression will look if it was fully factorised: 2xy(2 - 3xy).