7≤a≤5
a=3/2
3√
(√2)/4
(√5)/5
2X√6
2√7
4√3/15
2y√6y
2(x-y)√7(x-y)
3M√5
2(x-y)^2√7(x-y)
-2/b√ab
√12X18=√2×2×3×2×3×3=6√6
√4a^3=√2^2a^3=2a√a
√a^2b^3=-ab√b
√a/b^2=√a/b
√3y/4x^3=3y√x/(2x)
√M^2N^4+M^4N^2=√M^2N^2(N^2+M^2)=MN√((N^2+M^2)
7≤a≤5
a=3/2
3√
(√2)/4
(√5)/5
2X√6
2√7
4√3/15
2y√6y
2(x-y)√7(x-y)
3M√5
2(x-y)^2√7(x-y)
-2/b√ab
√12X18=√2×2×3×2×3×3=6√6
√4a^3=√2^2a^3=2a√a
√a^2b^3=-ab√b
√a/b^2=√a/b
√3y/4x^3=3y√x/(2x)
√M^2N^4+M^4N^2=√M^2N^2(N^2+M^2)=MN√((N^2+M^2)