multiply (2�ã7-5�ã3)(8�ã7-5�ã3)
Please type your subject in the School Subject box. Any other words, including obscure abbreviations, are likely to delay responses from a teacher who knows that subject well.
what does the ~ over the a mean?
does '2a7' mean 2a^7 ('a' to the 7th power) ?
that's means square root
square root of ?
'2a7' means?
does it mean 2(sqrt7)?
To multiply the given expression, (2√7 - 5√3)(8√7 - 5√3), we can use the FOIL method.
FOIL stands for "First, Outer, Inner, Last" and it helps us distribute and combine like terms when multiplying two binomials.
Let's break down the steps:
First: Multiply the first terms of both binomials.
(2√7) * (8√7) = 16√49 = 16 * 7 = 112
Outer: Multiply the outer terms of both binomials.
(2√7) * (-5√3) = -10√(7*3) = -10√21
Inner: Multiply the inner terms of both binomials.
(-5√3) * (8√7) = -40√(3*7) = -40√21
Last: Multiply the last terms of both binomials.
(-5√3) * (-5√3) = 25 * 3 = 75
Finally, combine the like terms obtained from each step:
112 - 10√21 - 40√21 + 75
Simplify the square root terms:
112 - √21(10 + 40) + 75
Combine the like terms:
112 - 50√21 + 75
Combine the constants:
187 - 50√21
So the final expression is 187 - 50√21.