Question

Най­ди­те зна­че­ние вы­ра­же­ния -24ab-(-4a+3b)^2 при a=V7,b=V5

Answer 1

1) -24ab-(-4a+3b)² = -24ab-(16a²-24ab+9b²) = -24ab-16a²+24ab-9b² = -16a²-9b² 
2) -16*(V7)² -9*(V5)² = -16*49V² -9*25V² = -784V² - 225V² = -1009V²