Question

lf (x-5) (x+3) = x²+ ax - 15, then the value of A is​

Answer 1

a=2

Step-by-step explanation:

multiply (x-5) and( x+3) and you will get a quadratic equation then compare both l.h.s and r.h.s you will get the value of a

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Answer 2

∣

∣

∣

∣

∣

∣

∣

∣

1

ω

2n

ω

n

ω

n

1

ω

2n

ω

2n

ω

n

1

∣

∣

∣

∣

∣

∣

∣

∣

=1(1−ω

3n

)−ω

n

(ω

2n

−ω

2n

)+ω

2n

(ω

4n

−ω

n

)

=(1−1)−ω

n

(0)+ω

2n

(ω

n

−ω

n

)=0+0=0.