a =V98 xV50 = V49x2 xV25x2 =V7²x2xV5²x2 =7V2x5V2 =35(V2)² =35x2 =70
b =V98 +V50 = 7V2+5V2 =12V2
c =2V20 -4V45 +V80 =2V4x5 -4V9x5 +V16x5 = 2V2²x5 -4V3²x5 +V4²x5 =4V5 -12V5+4V5 = 8V5-12V5 =-4V5
d = 4V3 xV12x2V8 = 4V3 xV4x3 x2V4x2 =4V3x2V3x4V2 =8(V3)² x4V2 =24x4V2 =96 V2
e = (2-3V5)(15+2V5) =30+4V5-45V5-6(V5)² = 30 -40V5 -30= -40V5
f = (3V5-2)² = (3V5)² -2(3V5x2 ) +(-2)² = 45-12V5+4 = -12V5 +49
g = 2V3x9 x V75 / V3 x(V5)² =6V3 x5V5 / V3x5 =30V15/5V3 =30V3xV5 = 5V3 =30V5/5 =6V5