Respuesta :

Peredhel
Hi!

Let's set up the equation.

[tex]4^{a} - 2^{b} + 40 [/tex]

Put in the values...

[tex]4^{2} - 2^{7} + 40 [/tex]

Now solve using PEMDAS

Exponents
[tex]16 - 128 + 40 [/tex]

Subtract
[tex]-112 + 40 [/tex]

Add
[tex]-72[/tex]

The answer is -72

Hope this helps! :)
4a to the fourth power -2b to the second power +40 means that
4a^4-2b^2+40 when a=2 and b=7, so
4a^4-2b^2+40
Substitute a with 2 and b with 7
4(2)^4-2(7)^2+40
=4(16)-2(49)+40
=64-98+40
=-34+40
=6. As a result, the correct answer is 6. Hope it help!

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