Ivan Lim's answer to Janice Lai's Secondary 4 A Maths question.
For the 2b, how to get the "4(1/2a)"
From (i), we derived 0.5a^2 for the product of roots. I simply factorise 2a^2 as 4(0.5a^2) so we can substitute the value in
Ohh ok I und dy, thanksss!!
:)
You can also sub a= -8/3 into 2a + 1/a too
You can also sub a= -8/3 into 2a + 1/a too
Okiee
How to get the 48/24 for the product
2a x 1/a = 2
2 = 48/24
We express it this way so we can compare and get the 24x^2 from the sum of roots, which is -137/24
2 = 48/24
We express it this way so we can compare and get the 24x^2 from the sum of roots, which is -137/24
Ohh ok thanks very much!
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