dear expert in the last question f part please tell me that why we have to solve it more as - Maths - Algebraic Expressions

Question

dear expert in the last question f part please tell me that why we
have to solve it more as we can also write it trinomial but it is
always binomial why ?

Sneha Apar · Accepted Answer

dear expert in the last question f part please tell me that why we have to solve it more as we can also write it trinomial but it is always binomial why ?