Where does the graph x^2-3x-4 cross the x axis?
First, you need to factorise the quadratic:x2-3x-4=0(x-4)(x+1)=0Then, set each of the brackets to equal 0 and solve for x:x-4=0 --> x = 4x+1=0 --> x=-1
SB
Related Maths KS3 answers
All answers ▸Solve the following simultaneous equations: 2y + 3x = 19 and 7x + y = 26.
Solve the following equation: b - 6 = 13
There are 12 counters in a bag. 1/2 are red, 1/3 of the remaining counters are blue. The rest are green. How many counters are green?
Round 4 and 3/8 to the nearest whole number.