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marigirl
 one year ago
Best ResponseYou've already chosen the best response.2dw:1442308220092:dw So basically what they are asking is that .. what can you multiple (x+15) by in order to obtain \[x^2+18x+45\]

marigirl
 one year ago
Best ResponseYou've already chosen the best response.2Here our factorising skills can come in handy. Can you factorize (i.e split into a pair of brackets) \[x^2+18x+45\] We know from the question one set of these brackets is going to be (x+15)

marigirl
 one year ago
Best ResponseYou've already chosen the best response.2Can you see what im getting at? \[(x+15)(x+?)=x^2+18x+45\]

marigirl
 one year ago
Best ResponseYou've already chosen the best response.2I need two numbers that will multiply to 45 and those two very same numbers must add to 18.... I already have a clue to use 15 .. so what will be the other number?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[x ^{2} + 18x +45 \]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0do u know how to factorise ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so basically you must get two values when add gives you +18 and when multiply you get +45
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