Answer:
25.5454545
Step-by-step explanation:

I believe the answer is a
1 because 1^4-25=-24 which is negative(so below the x-axis)
Answer:
Step-by-step explanation:
(a).
= x ( 2x + 1 ) = <em>2x² + x</em>
(b).
= 2( 2x + 1 )( 5x + 3 ) = <em>20x² + 22x + 6</em>
(c).
= 20x² + 22x + 6 - ( 2x² + x ) =
( 20x² - 2x² ) + ( 22x - x ) + 6 =
<em>18x² + 21x + 6</em>