Q15 of 38 Page 190

Let’s find the roots of the equations (i.e. let’s solve the equations).

3(y-5)2 + 5y = (2y-3)2 +1


3(y-5)2 + 5y = (2y-3)2 –(y+1)2+1

⇒ 3(y2 + 25 – 10y)+ 5y = (4y2 + 9 – 12y)- (y2+1+2y)+1


⇒3 y2 + 75 – 30 y + 5y= 4y2 + 9 – 12y - y2 – 1-2y+1


⇒3 y2 + 75 – 25 y = 3y2 + 9 – 14y


⇒3 y2 - 3y2 +75 – 9 = -14 y + 25y


⇒66 = 11y


Y = 6


More from this chapter

All 38 →
15

Let’s find the roots of the equations (i.e. let’s solve the equations).

5x - (4x-7) (3x-5) = 6-3 (4x-9) (x-1)


 15

Let’s find the roots of the equations (i.e. let’s solve the equations).

3(x-4)2+ 5(x-3)2 = (2x-5) (4x-1)-40


 16 A

Let’s write mathematical stories and from equations.

x = 5 →


 16 B

Let’s write mathematical stories and from equations.

y=-11 →