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Byju's Answer
Standard X
Mathematics
Method of Substitution to Find the Solution of a Pair of Linear Equations
10 x 2+15 x+6...
Question
10
x
2
+
15
x
+
63
5
x
2
-
25
+
12
=
2
x
+
3
x
-
5
Open in App
Solution
10
x
2
+
15
x
+
63
5
x
2
-
25
x
+
12
=
2
x
+
3
x
-
5
⇒
10
x
2
+
15
x
+
63
-
2
5
x
2
-
25
x
+
12
5
x
2
-
25
x
+
12
=
2
x
+
3
-
2
x
-
5
x
-
5
(
Dividendo
)
⇒
10
x
2
+
15
x
+
63
-
10
x
2
+
50
x
-
24
5
x
2
-
25
x
+
12
=
2
x
+
3
-
2
x
+
10
x
-
5
⇒
65
x
+
39
5
x
2
-
25
x
+
12
=
13
x
-
5
⇒
65
x
+
39
x
-
5
=
13
5
x
2
-
25
x
+
12
(
On
cross
-
multiplying
)
⇒
65
x
2
-
325
x
+
39
x
-
195
=
65
x
2
-
325
x
+
156
⇒
39
x
=
351
⇒
x
=
9
Suggest Corrections
0
Similar questions
Q.
Solve the following equations.
(i)
x
2
+
12
x
-
20
3
x
-
5
=
x
2
+
8
x
+
12
2
x
+
3
(ii)
10
x
2
+
15
x
+
63
5
x
2
-
25
x
+
12
=
2
x
+
3
x
-
5
(iii)
2
x
+
1
2
+
2
x
-
1
2
2
x
+
1
2
-
2
x
-
1
2
=
17
8
(iv)
4
x
+
1
+
x
+
3
4
x
+
1
-
x
+
3
=
4
1
(v)
4
x
+
1
2
+
2
x
+
3
2
4
x
2
+
12
x
+
9
=
61
36
(vi)
3
x
-
4
3
-
x
+
1
3
3
x
-
4
3
+
x
+
1
3
=
61
189
Q.
10
x
2
+
15
x
+
63
5
x
2
−
25
x
+
12
=
2
x
+
3
x
−
5
Q.
Solve
10
x
2
+
15
x
+
63
5
x
2
−
25
x
+
12
=
2
x
+
3
x
−
5
Q.
Solve the equation:
10
x
2
+
15
x
+
63
5
x
2
−
25
x
+
12
=
2
x
+
3
x
−
5
Q.
∫
d
x
(
3
+
4
x
2
)
√
(
4
−
3
x
2
)
=
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