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Solve this by using quadratic formula method b=(27) a=1 c=180 -b +/- √b-4ac ------------------------- 2a Please solve this question I have an doubt in sign i know the answer is 12 and 15 but i want to know where is the - sign ...???

Posted by Sambhavi Dambare 5 years, 8 months ago

CBSE > Class 10 > Mathematics

5 answers

Varsha Pandian 5 years, 8 months ago

x2 - 27x + 180.... 1 solution = -b + √b2-4ac ------------------ 2a = -(-27) + √(27)2 - 4(1)(180) ------------------------------------- 2(1) = 27 + 3 = 30 = 15 --------------- ------ 2 2 2 solution = -b - √b2-4ac ------------------ 2a = -(-27) - √(27)2 - 4(1)(180) ------------------------------------- 2(1) = 27 - 3 = 24 = 12 --------------- ------ 2 2

Sowndaryaa Lakshmi V 5 years, 8 months ago

No -12 and -15 hai maine karke dekhliya

Sanaya Sharma ???? 5 years, 8 months ago

kya minus24and minus 30h kya ans

Sowndaryaa Lakshmi V 5 years, 8 months ago

-12,-15

Sambhavi Dambare 5 years, 8 months ago

Sorry its little hauch pauch... A=1 B=27 C=180

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