Question

2&-4 are z.o.p k(x)=3x³-5x²+a(x)+b​

Answer 1

Step-by-step explanation:

p(2)=3(2)^3-5(2)^2+a(2)+b

=24-20+2a+b=0

=4+2a+b=0

=2a+b= -4

=a+b= -4÷2

=a+b= -2

p(-4)=2(-4)^3-5(-4)^2+a(-4)+b

= -128-80-4a+b=0

= 208-4a+b=0

= - 4a+b= -208

=a+b= -208÷ -4

=a+b=+52

Answer 2

a +b = -2

a +b = 52

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