16(b). Which of the following is the value of(-4)×[(-5)+(-3)]
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Answered by
1
Step-by-step explanation:
hlo mate here's your answer
Given: A(a,3),B(2,1) and C(5,a) are collinear.
∴
Slope of
AB=
Slope of
BC
⇒
2 − a
1 − 3
=
5 − 2
a − 1
⇒
2−a
−2
=
3
a−1
⇒
−6=
(2−
a)(a−
1)
⇒
−6=
2a−
2−
a 2
a
⇒
a 2
3a−
4=
0
⇒
a 2
4a+
a−
4=
0
⇒
(a−
4)(a+
1)=
0
a=
4,−1
For
a=
4
Slope of
BC=
5 − 2
a − 1
=
3
4−1
=
3
3
=
1
Equation of
BC;(y−
1)=
1(x−
2)
⇒
y−
1=
x−
2
⇒
x−
y=
1
For
a=
−1
Slope of
BC=
5 − 2
a − 1
=
3
−1−1
=
−
3
2
Equation of
BC:
(y−
1)=
−
3
2
(x−
2)⇒
3y−
3=
4−
2x
⇒ 2x+ 3y= 7
I hope its help you mark as brainlist plz
Answered by
0
Step-by-step explanation:
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