solve using identities 84 x 83
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Answered by
1
84×83
(84)(83)
(80+4)(80+3)
(x+a)(x+b) = x^2+x(a+b)+ab
= (80)^2+80(4+3)+4×3
= 6400+560+12
= 6972
Answered by
0
Answer:
12012
Step-by-step explanation:
- (80+4)X(80+3) using (x+a)(x+b)=x^2+x(a+b)+ab
- 80^2+80(4+3)+4X3
- 6400+80X7+12
- 6400+560+12
- 6972
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