# Hard SAT Math Question 63 — Video Explanation | 1600.now

Source: https://1600.now/hard/63

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63

$-25x^2 + (5ab)x + 25 = 0$  
For the given equation, $a$ and $b$ are positive constants. If the sum of solutions to the given equation is $mab$, where $m$ is a constant, what is the value of $m$?

A

$\frac{1}{25}$

B

$\frac{1}{5}$

C

$5$

D

$25$