Please help me do this and thank you

Question

-3a⁴b³times-5a⁴b⁵

Answer 1

(-3a⁴b³ )(-5a⁴b⁵)

 

Multiply like variables, multiply the coefficients,  remembering that multiplying two negative numbers give a positive result.  

Multiplying variables in exponential form, we add the exponents

Result (-3)(-5) =15

a⁴ x a⁴ = a⁸

b³ x b⁵ = b⁸

 Result = 15a⁸b⁸