find value by factorising
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Answered by
1
[(18.5)²-(6.5)²]/(18.5+6.5)
=(18.5+6.5)(18.5-6.5)/(18.5+6.5)
=18.5-6.5
= 12
=(18.5+6.5)(18.5-6.5)/(18.5+6.5)
=18.5-6.5
= 12
Answered by
1
a^2 -b^2 =( a+b)(a-b)
therefore ,
={(18.5+6.5)(18.5-6.5)}/25
={(25)(12)}/25
=300/25
=12
therefore ,
={(18.5+6.5)(18.5-6.5)}/25
={(25)(12)}/25
=300/25
=12
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