Question

Expand the following using suitable identities
1.
$( - 2x + 3y - 4z) {2} \\ \\ 2.(3x - 4y + z) {2}$
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Answer 1

Step-by-step explanation:

this is the answer it is in the best way all steps are clear

Answer 2

$(1). \\ = > ( - 2x + 3y - 4z) {}^{2} \\ = > 4x {}^{2} + 9y {}^{2} + 16z {}^{2} - 12xy - 24yz + 16xz \\ (2). \\ = > (3x - 4y + z) {}^{2} \\ = >9x {}^{2} + 16y {}^{2} + z {}^{2} - 24xy - 8yz + 6xz$