evaluate 105 multiply 106 and which identity j used
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We know that (x+a)(x+b)=x^2+(a+b)x+ab
x=100, a=5,b=6
105 × 106
= (100+5) (100+6)
= 100(100)+100(6) + 5(100) + 5(6)
= 10000+600 + 500+30
= 10000+1100+30
= 11130
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