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anonymous
 one year ago
I need some algebra help!
1. d^2 + 18d + 81
A) (d+9)(d9)
B) (d+9)^2
C) (d81)(d1)
D) (d9)^2
2. d^2  13d + 30
A) (d+10)(d+3)
B) (d+10)(d3)
C) (d10)(d+3)
D) (d10)(d3)
3. r^2  49
A) (r7)(r+7)
B) (r+7(r+7)
C) (r7)(r7)
D) (r7)(r+9)
anonymous
 one year ago
I need some algebra help! 1. d^2 + 18d + 81 A) (d+9)(d9) B) (d+9)^2 C) (d81)(d1) D) (d9)^2 2. d^2  13d + 30 A) (d+10)(d+3) B) (d+10)(d3) C) (d10)(d+3) D) (d10)(d3) 3. r^2  49 A) (r7)(r+7) B) (r+7(r+7) C) (r7)(r7) D) (r7)(r+9)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.01. d^2 + 18d + 81=d^2 +9d +9d +81=d(d+9)+9(d+9)=(d+9)^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0LOOKS LIKE YOU NEED TO FIGURE OUT THE MIDDLE AND LAST TERM THINK OF TWO NUMBERS THAT ADDS UP TO 18 AND YIELDS 81 WHEN MULTIPLIED TO EACH OTHER

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@jango_IN_DTOWN So number 1 is B?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ignore the last c ;)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.02.d^2  13d + 30 i will give hints 13=10+(3) and 30=(10)*(3)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.03. 49=7^2 and so use the formula of a^2b^2= (a+b)(ab)
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