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CBSE Class 10 Answered

Find the curve will intersect x axis at how many points -x^2+2x-15
Asked by origami & craft | 25 Mar, 2019, 09:51: PM
answered-by-expert Expert Answer
y(x) = x2 +2x -15
 
when the curve intersect x-axis means, y(x) = 0, hence we need to find roots of y(x)
 
x2 +2x - 15  = (x+5)(x-3) = 0
 
roots are 3, -5
 
curve will intersect x-axis at two points at x= 3 and x=-5
Answered by Thiyagarajan K | 26 Mar, 2019, 07:51: AM
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