Answer:
(2x+7) (x-3)
Step-by-step explanation:
2x²+x -21
2x²+7x-6x-21
x•(2x+7)-6x-21
x•(2x+7)-3(2x+7)
(2x+7) x(x-3)
=answer
Answer: D=169 ∴ irrational, not equal
a= 2 b=1 c= -21
D= b²-4(a)(c)
= 1²-4(2)(-21)
=1+168
D = 169
169 is a perfect square so the roots are irrational and are not equal
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Answers & Comments
Answer:
(2x+7) (x-3)
Step-by-step explanation:
2x²+x -21
2x²+7x-6x-21
x•(2x+7)-6x-21
x•(2x+7)-3(2x+7)
(2x+7) x(x-3)
=answer
(2x+7) (x-3)
Answer: D=169 ∴ irrational, not equal
Step-by-step explanation:
a= 2 b=1 c= -21
D= b²-4(a)(c)
= 1²-4(2)(-21)
=1+168
D = 169
169 is a perfect square so the roots are irrational and are not equal