Question

Solve fast...........

Answer 1

Please refer to the above image for solution!!

Thanks!!

Answer 2

If f(x) = 1 - 2x

i) Find f(-5)

f(-5) = 1 - 2(-5)

= 1 + 10

= 11

ii) g(f(x)) = 3(11) - 2

= 33 - 2

= 31

iii) h(x) = 0

x² - 5x - 11 = 0

By using Quadratic equation.

D = b² - 4ac

= (-5)² - 4(1)(-11)

= 25 + 44

= 69

$x = \frac{b - \sqrt{D} }{2a}$

$= \: \frac{( - 5) - \sqrt{69} }{2}$

$= \frac{ - 5 - \sqrt{69} }{2}$

$= - 9.1533..$

$x = \frac{ - b - \sqrt{D} }{2a}$

$x = \frac{ - ( - 5) - \sqrt{69} }{2}$

$x = \frac{5 - \sqrt{69} }{2}$

$x = 0.8466...$

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