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The shape of H3O is

The shape of [H<sub>3</sub>O]<sup>+</sup> is? trigonal planar pyramidal angular tetrahedral The correct option is ii. pyramidal

Factors of p^4-81 are

Given: To find factors of p<sup>4</sup>-81 Solution: p<sup>4</sup>-81 =(p<sup>2</sup>)<sup>2</sup>-(3<sup>2</sup>)<sup>2</sup> =(p<sup>2</sup>+3<sup>2</sup>)(p<sup>2</sup>-3<sup>2</sup>) =(p<sup>2</sup>+9)(p+3)(p-3) Therefore, the factors are (p<sup>2</sup>+9)(p+3)(p-3)