Solve the following equation by making an appropriate substitution. x Superscript negative 2 Baseline minus 2 x Superscript nega

Question

3 years ago

15

Solve the following equation by making an appropriate substitution. x Superscript negative 2 Baseline minus 2 x Superscript nega

tive 1 Baseline minus 15 equals 0 Make an appropriate substitution and rewrite the equation in quadratic form. Let uequals xz-1 x Superscript negative 1, then the quadratic equation in u is u^2-2u-15(-5)(u+3) (u-5 )(u+3 ).

Mathematics

1 answer:

IrinaK [193] · Answer 1 · 2022-06-28T05:10:48+03:00

IrinaK [193]3 years ago

7 0

Answer:

u^2-2u-15 = 0

Step-by-step explanation:

If you make the substitution ...

u equals x Superscript negative 1 Baseline

then you can rewrite the equation as shown above.