Question

A) 2y²-9²=

B) 4a²-a²

Answer 1

(A)

${2y}^{2} - {9}^{2}$

${2y}^{2} - 9.9$

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

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(B)

${4a}^{2} - {a}^{2}$

${4a}^{2} - {1a}^{2}$

$(4 - 1){a}^{2}$

${3a}^{2}$