Question

find p(x)=5xsquear -3x+7x at x=1​

Answer 1

Answer:

5x

2

−7x+k=0

Given that roots are reciprocal to each other

Let the roots be x,1/c

Products of roots=

5

k

=1

⟹k=5

Answer 2

$p(x) = 5 {x}^{2} - 3x + 7x \\ \\ = 5 {x}^{2} + 4x \\ \\ p(1) = 5 + 4 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ = 9 \: \: \: \: \: \: \: \: \: \: \: \: \: \:$