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bezimeni [28]
3 years ago
14

Please help, will mark Brainly and if you need help with anything I’ll help with any work you send

Mathematics
1 answer:
inessss [21]3 years ago
6 0

Answer:

The first one is missing (d - 9) so it would be 5(d -9) or when you factor it out 5d - 45

In the second one (d + 7) is missing so it will be 8d(d + 7) so if you factor that out you will receive 8d^2 + 56

Step-by-step explanation:

3d^2 + 18d -21 =(3d -3)( d + 7)

3d^2 -30d +27 =(3d -3)(d - 9)

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