2017 math

a= 7 −5√2b=−7−5√2et c =−7+5√2
b
a−c b=b2+c2
a2w=q99 −70√2
M P
AH =x 3
MQ =4
3(6 −x)

VCON E =1
3×π×R2×h
VBOU LE =3
4×π×R3
VCY LI N DRE =π×R2×h