Question 465959
Step 1

(4x)^(2)-(5x)^(2)+(4z)^(2)-(5z)^(2)+(8y)^(2)


Step 2

(4^(2)x^(2))-(5x)^(2)+(4z)^(2)-(5z)^(2)+(8y)^(2)


Step 3

(16x^(2))-(5x)^(2)+(4z)^(2)-(5z)^(2)+(8y)^(2)


Step 4


(16x^(2))-(5^(2)x^(2))+(4z)^(2)-(5z)^(2)+(8y)^(2)


Step 5

(16x^(2))-(25x^(2))+(4z)^(2)-(5z)^(2)+(8y)^(2)


Step 6

(16x^(2))-(25x^(2))+(4^(2)z^(2))-(5z)^(2)+(8y)^(2)


Step 7

(16x^(2))-(25x^(2))+(16z^(2))-(5z)^(2)+(8y)^(2)


Step 8

(16x^(2))-(25x^(2))+(16z^(2))-(5^(2)z^(2))+(8y)^(2)


Step 9

(16x^(2))-(25x^(2))+(16z^(2))-(25z^(2))+(8y)^(2)


Step 10

(16x^(2))-(25x^(2))+(16z^(2))-(25z^(2))+(8^(2)y^(2))


Step 12

(16x^(2))-(25x^(2))+(16z^(2))-(25z^(2))+(64y^(2))


Step 13

16x^(2)-(25x^(2))+16z^(2)-(25z^(2))+64y^(2)


Step 14

16x^(2)-25x^(2)+16z^(2)-(25z^(2))+64y^(2)


Step 15

16x^(2)-25x^(2)+16z^(2)-25z^(2)+64y^(2)


Step 16

-9x^(2)+16z^(2)-25z^(2)+64y^(2)


Step 17

-9x^(2)-9z^(2)+64y^(2)


Answer:
-9x^2-9z^2+64y^2

This is as thorough as I can get it!! Good Luck 

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