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03.07.2020 •
Mathematics
Please help me with this math problem
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Ответ:
(z-9)(z+2)
Step-by-step explanation:
U have to find numbers which when u multiply u get -18 and subtract u get -7
-18= -9×+2,2-9=-7
Z²+2z-9z-18
Z(z+2)-9(z+2)
(Z-9)(z+2)
Ответ:
(z+2)(z-9)
Step-by-step explanation:
Those two numbers could be -9 and 2 .
now rewrite the expression like this.
(
Factor it out z in the first grouping
z(z +2) -9(z + 2) factor out x+2
(z +2 ) (z-9)
Ответ:
3 and 4
Step-by-step explanation: