4m^- 8m = 21 can you give this answer by the abvove method
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hope this helps you
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shanummishra13:
yehh thanks
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hey friend!!!!
=> 4m²-8m=21
=> 4m²-8m-21= 0
in this equation {a=4, b=-8, c=-21}
Now
m = { -b ± root(b²-4×a×c) }/2×a
m = 8±root(64+16×4×4)/8
m = 8±root(64 + 336)/8
m = 8±20/8
Now
m = 8+20/8. = 3.5 ___ans
or
m = 8-20/8 = -1.5____ans
hope it will help you..
=> 4m²-8m=21
=> 4m²-8m-21= 0
in this equation {a=4, b=-8, c=-21}
Now
m = { -b ± root(b²-4×a×c) }/2×a
m = 8±root(64+16×4×4)/8
m = 8±root(64 + 336)/8
m = 8±20/8
Now
m = 8+20/8. = 3.5 ___ans
or
m = 8-20/8 = -1.5____ans
hope it will help you..
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