Question

4. Find the values using expansion formula
(1) 21 x 23
(2)52 x 54
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Answer 1

Step-by-step explanation:

20+1*20+3 50+2*50+4 is expansion form

Answer 2

Answer:

1. 483

2. 2808

Step-by-step explanation:

(x+a)(x+b)=x²+(a+b)x+ab

1. (20+1)(20+3)=20²+(1+3)20+(1)(3)

=400+(4)20+3

=483

2. (50+2)(50+4)=50²+(2+4)50+(2)(4)

=2500+(6)50+8

=2808