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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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jango_IN_DTOWN
 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

hwyl
 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 ;)

jango_IN_DTOWN
 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)

jango_IN_DTOWN
 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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