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freshman level algebra?
here are some examples of the problems anyone know how to do them?
Find the sum or difference
(a^2-4a+b) + (3a^2 +13a+1)
Find the product
(2x^2-3x+5)(x+4)
Factor the polynomials
t^2 = 10t+25
Solve the equation
21z^2+85z-26 = 0
3 Answers
- aahazelipLv 51 decade ago
t^2+10t+25
(t+5)(t+5)
21z^2+85z-26=0
(3x+13)(7x-2)=0
3x+13-13=0-13 3x= -13 divide by 3 x= -13/3
7x-2+2=0+2 7x= 2 divide by 7 x= 2/7
- 1 decade ago
okay...
3a squared and 1a sqaured are like terms so you combine them...
4a ^2
-4a and 13a are like terms combine them
9a
1 and b are not like terms
1+b
combine everything...
4a^2+9a+1+b
next:
distribute one section to the other...
2x^2 times x is
2x^3 because x's exponent is 1 and when multiplying... add exponents and mult the number: 2 x 1 is 2, add exponents and get 2x^3
2x^2 times four is 8x^2
-3x times x is -3x^2
-3x times 4 is -12 x
5 times x is 5x
5 times 4 is 20
combine:
2x^3+8x^2-3x^2-12x+5x+20
combine like terms: 2x^3+5x^2-7x+20
next:
too hard to explain
Next:
add 26 to each side
21z^2+85z=26
- 1 decade ago
Find the sum or differnece.
sum:
4a^2 +9a+b+1
difference
-2a^2-17a-b-1
Product
2x^3 +6x^2-7x+20
