Question

3. a) Factorise : 3x2 - 5x - 12.
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Answer 1

Answer:

x = +3  or x= -4/3

Step-by-step explanation:

let:-

$3x^{2}$-5x-12 = 0

=>$3x^{2}$ -9x+4x-12 = 0      ----[splitting -5x into -9x+4x]

=>3x(x-3)4(x-3) = 0

=>(x-3)(3x+4) = 0

==> x = 3 or x= -4/3