Help!!! will give medal
Multiply. x+2/5x-15 times (10x^2-25x-15)

Question

Help!!! will give medal 
Multiply. x+2/5x-15  times (10x^2-25x-15)

anonymous · Answer

Choices

A. (2x+1)/5(x-3)
B. (2x+1)(x-3)/5
C.(10x+5)(x+2)
D. (x+2)(2x+1)

campbell_st · Answer

well factor the quadratic equation 

and you get 

$$5(2x^2 -5x - 3)$$

which can be further factored to 

$$5(x - 3)(2x + 1)$$

so this can be written as 

$$(5x - 15)(2x + 1)$$

so the problem is now 

$$\frac{(x + 2)}{(5x - 15)} \times \frac{(5x - 15)(2x + 1)}{1}$$

cancel common factors and you'll have your solution..

anonymous · Answer

what are those @campbell_st

campbell_st · Answer

well what do you see that is the same... in the numerator and denominator.... 

whatever it is... cross it out... what's left is the answer

anonymous · Answer

5x is the same so I cross out tht

anonymous · Answer

@campbell_st

campbell_st · Answer

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