Answer:
A polynomial needs to have either addition, subtraction or multiplication in the equation.
The 2nd, 3rd and 4th answers have subtraction and addition, so those are polynomials.
The first answer is a fraction, which is a division problem, therefore is not a polynomial.
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Step-by-step explanation:
19 * 70 = ( 20-1) * 70
= 20*70 - 1*70
= 1400 - 70
= 1330
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