Factor 2pq - 5qr + 10r - 4p.
a)
(q - 10)(p - 5r)
b)
(q - 2)(2p - 5r)
eliminate
c)
(2q - 2)(2p - 5r)
d)
(q - 2)(10p - 4r)

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.

1) the property is   ixi = a ⇔x = a   o x = -a

4(x-5)+3= 15⇒4x-20+3 = 15⇒4x-17= 15⇒4x = 15+17⇒4x = 32⇒x =32/4= 8

4(x-5) +3= -15⇒4x-20 +3 = -15⇒4x-17= -15⇒4x =-15+17⇒4x = 2⇒x =2/4= 1/2

the values are x =8 and x = 0,5