Question

solve it (9-y) ² maths class 9
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Answer 1

Answer:

$81 - 18y + {y}^{2}$

Step-by-step explanation:

$(9 - y {)}^{2} \\ = )(a - b {)}^{2} = {a}^{2} - 2ab + {b}^{2} \\ = ) {(9)}^{2} - (2 \times 9 \times y) + {(y)}^{2} \\ = )81 - 18y + {y}^{2}$

Hope it helped

Answer 2

Answer:

81-18y+y^2

Step-by-step explanation:

(9-y)^2

(9-y)(9-y)

81-9y-9y+y^2

therefore,81-18y+y^2