Question

verify whether the following are zeros of the polynomial indicated against them
1-p(y)=2y²+5y-3 at y= -1/2
2-p(z)=z²+z-6 at z= -3
3-p(x)=2x³-3x²+5x-1 at x=1
4-p(t)=2x³-9x+x+12 at x=3/2​.

Answer 1

Step-by-step explanation:

$1)p(y) = 2y {}^{2} + 5y - 3 \\ y = - 2 \\ = 2( - 1 \div 2) {}^{ {}^{2} } + 5( - 1 \div 2) - 3 \\ = 2( - 1 \div 4) - 5 \div 2 - 3 \\ = - 1 \div 2 - 5 \div 2 - 3 \\ = - 6 \div 2 - 3 \\ = - 3 - 3 \\ = - 6$

remaining questions are also solved in the same manner