Question

please answer me fast please

Answer 1

$<b>Heya mate. (^_-). Solution below.$
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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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$<marquee>Thank you.</marquee>$

Answer 2

нєуα

нєяє ιѕ тнє αиѕωєя :-

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9. (χ² + 3)(χ² - 8)

υѕιиg ι∂єитιту :-

(χ + α)(χ + в) = χ² + (α + в)χ + αв

нєяє, χ = χ², α = 3 αи∂ в = -8

=> (χ²)² + [3 + (-8)]χ² + (3)(-8)

=> χ⁴ - 5χ² - 24

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10. (3 - χ)(5 - χ)

яєαяяαиgιиg ιт.

(-χ + 3)(-χ + 5)

υѕιиg ι∂єитιту :-

(χ + α)(χ + в) = χ² + (α + в)χ + αв

нєяє, χ = -χ, α = 3 αи∂ в = 5

=> (-χ)² + (3 + 5)(-χ) + (3)(5)

=> χ² - 8χ + 15

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нσρє тнιѕ нєℓρѕ.