Which of the following equation has roots -2 and 7? a) x2 – 5x +14 =0 b) x2 + 5x -14 =0 c) x 2 – 5x -14 =0 d) x 2 +5x +14 =0
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Answer:
_______________
a) x^2 - 5x + 14 = 0
x^2 - 7x + 2x + 14 = 0
x ( x - 7 ) + 2 ( x + 7 ) = 0
( x - 7 ) ( x + 2 )
• x - 7 = 0
x = 7
•. x + 2 = 0
x = -2 ✓
1st option is correct .
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Answer:
A} x*+5x-14=0
Step-by-step explanation:
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