B) V2 - 3V z + 9V z; I) 8Vc + Vd - Va - 4Vc. в) /125 + 7/5; I) V32 - V128. в) 3/5 + / 20 + 80; 2 T) 3/12 + 2V3 - 3027. 3

It looks like you’re working with square roots (V stands for √). I’ll simplify each expression by combining like radicals.

Assumptions:

• √2 means sqrt(2), √z means sqrt(z), etc.
• When like radicals share the same radicand, I combine coefficients.

Results:

• B) √2 − 3√z + 9√z = √2 + (−3 + 9)√z = √2 + 6√z

• I) 8√c + √d − √a − 4√c = (8 − 4)√c + √d − √a = 4√c + √d − √a

• в) √125 + 7/5 = 5√5 + 7/5

• I) √32 − √128 = 4√2 − 8√2 = −4√2

• в) 3/5 + √20 + 80 = 3/5 + 2√5 + 80 = 80 + 3/5 + 2√5 = 403/5 + 2√5

• 2 T) 3/12 + 2√3 − 3027 = 1/4 + 2√3 − 3027 = 2√3 − 12107/4

If you intended different notation (for example, a different symbol for the square root or missing parentheses), please share the exact statements and I’ll adjust. If you want decimal approximations for the radical parts (where possible), I can provide those too.