Question

show that x is equal to minus 3 is a solution of 2 X square + 5 x minus 3 is equal to zero​

Answer 1

p(x) = 2x²+5x-3

p(-3) = 2×(-3)² + 5×(-3) - 3

= 18 - 15 - 3

= 0

Since answer obtained is zero

x = -3 is a solution of given polynomial

Hence proved

Answer 2

if X= -3 is a solution of 2 X square plus five X -three then p(X)=0