Question

hi please answer me fast please

Answer 1

this answer is done by simply multiplying both the expression and it can also be done by using identities if it satisfies all the conditions

Answer 2

$<b>Heya mate. (^_-). Solution below.$
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(1) (x² + 3)(x² - 8)


= x²(x² - 8) + 3(x² - 8)

= x⁴ - 8x² + 3x² - 24

= x⁴ - 5x² - 24
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(2) (3 - x)(5 - x)


= 3(5 - x) - x(5 - x)

= 15 - 3x - 5x + x²

= 15 - 8x + x²

= x² - 8x + 15.
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(3) (xy + 6)(xy - 5)


= xy(xy - 5) + 6(xy - 5)

= x²y² - 5xy + 6xy - 30

= x²y² + xy - 30.
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$<marquee>Thank you.</marquee>$