1. add or subtract
{4x^2+15x-3}-(3x^2+5)
a.7x^2+15x-8**
b.x^2+12x+2
c.x^2+15x-8
d.7x^2+8
2. Simplify the polynomial
-3f^2+4f-3+8f^2+7f+1
a.5f^2-11f+2
b.11f^2+11f+2**
c.5f^2+11f-2
d.-5f^2+11-2
3. Add or subtract
(2x^2+6x+1)+(-7x^2+2x-3)
a.5x^2-4x-2
b.-5x^2+8x-2
c.5x^2-8x+2**
d.-9x^2-8x+2
4.Name the coefficients in the polynomial
4x^2+3x-3
a.4,-3,-3
b.4,3
c.4,3,3**
d.-4,-3
5. How many terms are in the following polynomial?
6x^4+3x^3-2x^2+15x-14
a.5
b.4** or
c.3**
d.2
6. In the expression -7x-5x^2+5, what coefficient of x?
a.7
b.5
c.-5**
d.-7
7.write the expression using a single exponent
2^2 * 2^8
a. 4^10
b. 2^10
c. 4^16**
d. 2^16
8.write the expression using scientific notation
(2.5*10^4)(4*10^3)
a.10*10^7
b.10*10^8**
c.1*10^8
d.10*10^12
9.list three different ways to write 5^11 as of two powers. explain why all three of of your expressions are equal to 5^11
1. (4x^2 + 15x - 3) - (3x^2+5) =
4x^2 + 15x - 3 - 3x^2 - 5 = x^2 + 15x - 8.
2. -3f^2 + 4f - 3 + 8f^2 + 7f + 1 = 5f^2 + 11f - 2.
3. Ans: b.
4. Ans: b.
5. Ans: a.
6. Ans: -7.
7. 2^2 * 2^8 = 2^10.
8. (2.5*10^4)(4*10^3) = 10*10^7 = 1*10^8.
9. When multiplying, add the exponents:
5^2*5^9 = 5^11.
5^3*5^8 = 5^11.
5^4*5^7 = 5^11.
1-3. Wrong. Pay attention to ± signs.
Did not go further.