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dem82 [27]
3 years ago
12

Factorise x(squared) + 7x - 30

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
7 0
X^2+7x-30
what we do is we find what 2 number multiply to get -30 and add to get 7
factor 30
30=2 times 3 times 5
we know that is has to be negative eventually so one is negative and one is positivie so we do2 factors and add
2 times 5=10
10 and -3
add
10-3=7
checks
10 times -3=-30

so we put those in
(x-3)(x+10)
factored
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