factorize the following expression
a) 7p-14q+63
Answers
Answered by
2
Step-by-step explanation:
Consider first your two initial equations forming a System:
{
7
p
+
5
q
=
2
8
p
−
9
q
=
17
Let us solve this system to find
p
and
q
: to solve it let us multiply the first equation by
9
, the second by
5
and add them together in columns:
{
9
×
7
p
+
5
q
=
2
5
×
8
p
−
9
q
=
17
{
63
p
+
45
q
=
18
40
p
−
45
q
=
85
add them:
103
p
+
0
=
103
so:
p
=
103
103
=
1
substituting into the first equation we get:
7
+
5
q
=
2
q
=
−
1
Using these values of
p
and
q
into:
−
p
+
14
q
you get:
−
1
−
14
=
−
15
Answered by
0
Answer:
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