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olchik [2.2K]
4 years ago
6

What is the left and right most x intercepts of x squared +2x -15

Mathematics
1 answer:
kicyunya [14]4 years ago
7 0

Answer:

- 5, 3

Step-by-step explanation:

{x}^{2}  + 2x - 15 \\  =  {x}^{2}  + 5x - 3x - 15 \\  =x(x + 5) - 3(x + 5)\\ = (x + 5)(x - 3) \\ Let \: (x + 5)(x - 3)  = 0 \\ x + 5 = 0 \:  \: or \:  \: x - 3 = 0 \\ x =  - 5 \:  \: or \:  \: x = 3 \\

Hence, the left and right most x intercepts are--5 and 3 respectively.

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