19) Find the roots of v3x2 + 10x - 8V3 = 0 by Quadratic formula.
20) Find the fifth term from end of an A.P 2,7, 12,............45.
21) AABC is an obtuse triangle, obtuse angled atb.if AD 1 CB, porve that ACP = AB + BC2 +2BC BD
Answers
Answered by
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Step-by-step explanation:
3
x
2
+10x−8
3
=0
3
x
2
+6x+4x−8
3
=0
3
x(x+2
3
)−4(x+2
3
)=0
(x+2
3
)(
3
x−4)=0
∴ x=−2
3
and x=
3
4
∴ We can see both roots are irrational
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