Question

Expand (ii)(x+5)(x+6)(x+4)​

Answer 1

Answer:

5+5

4+6

6+4.............

Answer 2

Since,

(x+a)(x+b)(x+c)

= x³ + (a+b+c)x² + (ab+bc ac)x + abc -- (i)

In question, a = 5 ; b = 6 & c = 4

Put value of a, b & c in (i)

x³ + (5+6+4)x² + (30+24+20)x + 120

= x³ + 15x² + 74x + 120 ______(Ans.)

Hope it helps....

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