nat573
Answered

Factor z2 + 17z + 72.
A. (z – 9)(z + 8)
B. (z + 9)(z – 8)
C. Not factorable
D. (z + 9)(z + 8)

Answer :

Standard form:z2 + 17z + 72 = 0
Factorization:(z + 9)(z + 8) = 0
Solutions based on factorization:z + 9 = 0   ⇒   z1 = −9z + 8 = 0   ⇒   z2 = −8
Extrema:Min = (−8.5, −0.25)
Ckaranja
[tex] z^{2} +17z+72 Product= 72 Sum = 17 [/tex]
[tex] z^{2} +9z+8z+72[/tex]
z(z+9)+8(z+9)
(z+8)(z+9)

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