this is the question and please answer this..Very urgent!!
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Answer:
a ) answer = - 154
b) answer = - 0.8
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Step-by-step explanation:
a ) (2x² - 5y²) ( x² + 3y² )
= ( - 4 - 10 ) ( - 1 + 12 )
= - 14 × 11
= - 154
b ) ( ½a - ⅕b ) ( ½a² - ⅓b²)
= 1 - 0.8 × 2 - 4
= 0.2 × - 2
= - 0.8
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