What is the square root of 0.64

0.8

Step-by-step explanation:

First, let's solve it without the decimal. So it would be this:

. That one is pretty easy. Think about it. 8^2 = 64 so the sqare root of 64 is 8.

Now, for the decimal. It's 0.64. That's into the hundreths of 2 decimal spots. To find the square root are answer will be 8, moved one slot over.

So our answer is:

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

its c or d   take a lucky guess my dude