The discriminant is b<span>²-4ac We can rewrite x</span>² = 4 to x<span>² + 0x - 4 = 0 So a = 1, b = 0, c = -4 </span>Δ = 0 - 4 * 1 * -4 Δ = 16 The answer is B
How? When they say directly you should multiply the x and y together. You would get -24, now using that number divide -24 by the new x(-6) you would get 4.
