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GiselyBrenda
@GiselyBrenda
May 2020
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Fatore cada uma das expressoes algebricas
a) 81-q²
b) 4z²-25
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cintitamat
Verified answer
A)
81-q² = (9-q).(9+q)
b)
4z²-25 = (2z-5).(2z+5)
3 votes
Thanks 3
cintitamat
Obg linda!!!!
poty
A) 81 - q² = 0
-q² = - 81 (-1)
q² = 81 ------> q =√81 --->
q = 9
Fatorando: -(-81+9²) = 0
-9 (-9 + 9) = 0
b) 4z² - 25 = 0
4z² = 25
z² = 25/4
z² = 6,25 --> z=√6,25 -->
z = 0,5
Fatorando: 0,5(8z² - 50) = 0
1 votes
Thanks 4
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Verified answer
A) 81-q² = (9-q).(9+q)b) 4z²-25 = (2z-5).(2z+5)
-q² = - 81 (-1)
q² = 81 ------> q =√81 ---> q = 9
Fatorando: -(-81+9²) = 0
-9 (-9 + 9) = 0
b) 4z² - 25 = 0
4z² = 25
z² = 25/4
z² = 6,25 --> z=√6,25 --> z = 0,5
Fatorando: 0,5(8z² - 50) = 0