Fatima17777
Fatima17777
22-11-2020
Mathematics
contestada
What is the correct answer for both ?
Respuesta :
vanessaakaraiwe123
vanessaakaraiwe123
22-11-2020
Answer:
19. Option A
20. Option B
Step-by-step explanation:
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jayjayf
jayjayf
22-11-2020
Answer of 19 is A by using the a^2 - b^2 = ( a - b) ( a + b) so this will be (r-1 )( r+1) because we have r^2 so we have to factorize it
Answer of 20 is B by following the same steps
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