ICSE Class X Math 2013 Solved Paper
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Question : 12
Total: 46
Solve the following equation and calculate the answer correct to two decimal places :
x 2 − 5 x − 10 = 0
Solution:
Given : x 2 − 5 x − 10 = 0
Here,a = 1 , b = − 5 c = − 10
∴ D = b 2 − 4 a c
= ( − 5 ) 2 − 4 × 1 × − 10 = 65
x =
=
=
=
,
=
, −
x = 6.53 , − 1.53
Here,
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