Question

Quadratic or not?

C= πd ____
½(s+1)=0 ____
2x(x+3)=0 ____
(t+4)(t+7)=0 ____
x+3x²=0 ____​​

Answer 1

Answer:

1. No

2. No

3. Quadratic

4. Quadratic

5. Quadratic

Answer 2

Answer:

Sorry, I don't know the first 2,

But,

ii.) 2x(x+3)=0 is a quadratic equation

=2x²+6x=0 where, constant is 0

iii.) (t+4)(t+7)=0 is a quadratic equation

=t(t+7)+4(t+7)=0

= t²+7t+4t+28=0

=t²+11t+28=0

iv.) x+3x²=0 is a quadratic equation

If this helps you please please mark it as brainliest answer....