The sum of 8x^2-x+4 and x-5 is
1) 8x^2+9
2)8x^2-1
3)8x^2-2x+9
4)8x^2-2x-1
explain how you got your answer

8x² - 1

Step-by-step explanation:

Summing the 2 expressions together gives

8x² - x + 4 + x - 5 ←  collect like terms

= 8x² + (- x + x) + (4 - 5)

= 8x² + 0 + (- 1) = 8x² - 1

Option 2

Step-by-step explanation:

8x²-x+4

+    x-5

=

8x²-1

b

step-by-step explanation:

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d