Question

(5a – 4) (5a + 4) using identities

Answer 1

Answer:

25a^2_16

Step-by-step explanation:

$(a + b)(a - b)$=a^2-b^2

so we write (5a+4)(5a-4)=(5a)^2-4^2

25a^2-16

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Answer 2

Answer:

$(5a−4)(5a+4)</p><p></p><p></p><p>=25a2−16</p><p></p><p>$