Straight lines y=4-3x,at=x+10,2y+bx+9=0 represent the three consecutive sides of rectangle,then ab=?

Straight lines y=4-3x,at=x+10,2y+bx+9=0 represent the three consecutive sides of rectangle,then ab=?

Straight lines y=4-3x,at=x+10,2y+bx+9=0 represent the three consecutive sides of rectangle,then ab=?

Straight lines y=4-3x,at=x+10,2y+bx+9=0 represent the three consecutive sides of rectangle,then ab=?

TALK TO SUPPORT VIA LIVE CHAT TO SEE THIS ANSWER AT $ 10 ONLY