[email protected]_F3V3R SG a) x2 +x(12-kx)=12x2 + 12 x – kx2 = 12(1-k)x2 − 12x − 12 =0 b2−4ac = 0144 − 4(1−k)(−12) = 0144 − 48 ( 1−k ) = 0144 – 48 + 48k = 048 k = -96k = -2 b) 2x2 ≥ 5x + 12 2x2−5x − 12 ≥0 (2x + 3)(x − 4) ≥0 x≥ - 3/2 or x≥ 4
[email protected]_F3V3R SG App. that would be the answer i have gotten... ...gow did u get for 1a?or is there any mistake in my steps? ==> my teacher just say go home and try, should be a easy qn, just give us the second half then go on to de other qn...so xian