Question

(4х-3)•(4х+3)-(2+х)(х-2)
с объяснением пж
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Answer 1

$(4x - 3) \times (4x + 3) - (2 + x)(x - 2)$

$16 {x}^{2} - 9 - (2 + x)(x - 2)$

$16 {x}^{2} - 9 - {x}^{2} + 4$

$16 {x}^{2} - {x}^{2} - 9 + 4$

$15 {x}^{2} - 9 + 4$

$15 {x}^{2} - 5$