Expand : (39-5b-c)^2
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It's nothin' huge,mate.
We know that,
(a+b+c)²=a²+b²+c²+2ab+2bc+2ca
Here,a=39,b=5b,c=c.
=>(39-5b-c)²=39²+(5b)²+c²+2(39)(5b)+2(5b)(c)+2(c)(39)
=1521+25b²+c²+390b+10bc+78c.
That's it.
Mark my answer as brainliest.
Follow me on Instagram @wazz94.
Have a nice day :)
We know that,
(a+b+c)²=a²+b²+c²+2ab+2bc+2ca
Here,a=39,b=5b,c=c.
=>(39-5b-c)²=39²+(5b)²+c²+2(39)(5b)+2(5b)(c)+2(c)(39)
=1521+25b²+c²+390b+10bc+78c.
That's it.
Mark my answer as brainliest.
Follow me on Instagram @wazz94.
Have a nice day :)
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