prove that 9x square +30x+28 has …
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Posted by Bhavneet Kaur 3 years, 10 months ago
- 1 answers
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Yogita Ingle 3 years, 10 months ago
ax2 + bx + c = 0
9x2 + 30x + 28 =0
a = 9, b = 30, c = 28
Now b2 - 4ac = (30)2 - 4(9) (28)
= 900 - 1008
=-108
∴ b2 - 4ac< 0
∴ no real roots
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