Question

simplify useing identities(m²-5)(m²+3)
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Answer 1

Answer:

m⁴-8m²-15

Please mark me as brainliest and hope it helps

Answer 2

Answer:

m⁴-2m²-15

Step-by-step explanation:

$( {m}^{2} - 5)( {m}^{2} + 3) \\ = {( {m}^{2}) }^{2} + ( - 5 + 3) {m}^{2} + ( - 5) \times 3 \\ = {m}^{4} - 2 {m}^{2} - 15$