$\begin{array}{1 1}(A)\;(4,2)\;and\;(-2,-6)\\(B)\;(4,0)\;and\;(-2,-6)\\(C)\;(4,2)\;and\;(2,6)\\(D)\;(4,-2)\;and\;(-2,6)\end{array}$

Need homework help? Click here.

$4x-3y-10=0$ -----(1)

$x^2+y^2-2x+4y=20$------(2)

Solving (1) and (2) we get,

$\bigg(\large\frac{3y+10}{4}\bigg)^2+y^2-2 \bigg( \large\frac{3y+10}{4}\bigg)$$+4y-20=0$

=> $9y^2+60\;y+100 +16y^2-24y-80+64\;y-320=0$

=>$25y^2+100y-300=0$

=> $y^2+4y-12=0$

=> $y=2,-6$

=> $x=4,-2$

Points are $(4,2)$ an $(-2,-6)$

Hence A is the correct answer.

Ask Question

Tag:MathPhyChemBioOther

Take Test

...