The simplified form is -15ab of theexpression(5b)(-3a).The givenexpressionis (5b)(-3a).Five times of b times of minus three times of a.a and b arevariablesin the expression.We have to multiply 5b with -3a.To do this letsmultiply5 with 3.5×3=15So s (5b)(-3a) = -15ab.Hence, the simplified form is -15ab.To learn more onExpressionsclick:brainly.com/question/14083225#SPJ6...

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