Question

1.
$(3m + 12n) {?}^{2}$
2.
$(2x - 5y) {?}^{2}$
3.
$(8x - 7y) { }^{2}$
4.
$(9c - 11d) {?}^{2}$
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Answer 1

1. (3m + 12n)(3m + 12n) = 9n^2 + 36mn + 36mn + 144n^2 = 9n^2 + 72mn + 144n^2
2. (2x - 5y)(2x - 5y) = 2x^2 - 10xy - 10xy + 25y^2 = 2x^2 - 20xy + 25y^2
3. (8x - 7y)(8x - 7y) = 64x^2 - 56xy - 56xy + 49y^2 = 64x^2 - 112xy + 49y^2
4. (9c - 11d)(9c - 11d) = 81c^2 - 99cd - 99cd + 121d^2 = 81c^2 - 198cd +121d^2