Question

Multiply: (a + b – c) (5a – b + c).



plz answer in dum​

Answer 1

Answer:

(5a²)-(b²)+(c²)-(4ab)-(4ac)

Step-by-step explanation:

=> [a(5a-b+c)] + [b(5a-b+c)] - [c(5a-b+c)]

=> (5a²)-(ab)+(ac) + (5ab)-(b²)+(bc) - (5ac)-(bc)+(c²)

=> (5a²)-(b²)+(c²)-(4ab)-(4ac)

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