X- intercepts of ? 0 = x^2 - 5x - 24
1 Answer
Mar 6, 2018
Explanation:
"to find the x-intercepts, that is the points on the x-axis"
"where the graph crosses"
x^2-5x-24=0larrcolor(blue)"in standard form"
"factorise the quadratic using the a-c method"
"the factors of - 24 which sum to - 5 are - 8 and + 3"
"equate each factor to zero and solve for x"
x-8=0rArrx=8larrcolor(red)"x-intercept"
x+3=0rArrx=-3larrcolor(red)"x-intercept"
graph{x^2-5x-24 [-10, 10, -5, 5]}